Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

Fix OnePlus Fingerprint issues - 1

The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

Fix OnePlus Fingerprint issues without Persist - 2

STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
  • Take a Backup of Persist Partition: Fix Fingerprint Not Working
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  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

(Cancel Reply)

Δ

Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

Fix OnePlus Fingerprint issues - 5

The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

Fix OnePlus Fingerprint issues without Persist - 6

STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
  • Take a Backup of Persist Partition: Fix Fingerprint Not Working
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Google preferred - 7 Google preferred - 8
  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

(Cancel Reply)

Δ

Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

Fix OnePlus Fingerprint issues - 9

The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

Fix OnePlus Fingerprint issues without Persist - 10

STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
  • Take a Backup of Persist Partition: Fix Fingerprint Not Working
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Google preferred - 11 Google preferred - 12
  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

(Cancel Reply)

Δ

Take a Backup of Persist Partition: Fix Fingerprint Not Working

In this guide, we will show you the steps to take a backup of the persist partition on your Android device. Stepping into the custom development brings in a plethora of goodies with itself. Right after you have unlocked the bootloader, you will be in a position to dive deep into the custom ROMs, custom recoveries, or gain administrative privileges by rooting the device via Magisk. However, this is just one side of the coin. Carrying out these tweaks could prove to be a risky bet as well.

Backup Persist Partition - 13

For OnePlus users, it is usually issues with the fingerprint sensor that seems to be bugging quite a few users. As a result of which, they are unable to register or enroll their fingerprint or use the already registered ones to unlock their device. So right before you step into the modding domain, your first course of action should be to take a backup of the persist partition. In case you end up messing with the fingerprint, then you could easily fix it by restoring the backed up persist. On that note, let’s get started with the steps to take a backup of the persist partition.

  • How to Take a Backup of Persist Partition STEP 1: Root your Device STEP 2: Install Android SDK STEP 3: Enable USB Debugging STEP 4: Grant SuperUser Request STEP 5A: Backup Persist Partition via ADB [Automated Method] STEP 5B: Backup Persist Partition via SU [Manual Method]
  • How to Restore Persist Partition

How to Take a Backup of Persist Partition

YouTube video - 14

The below instructions are listed under separate sections for ease of understanding. Make sure to follow the same sequence as mentioned. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Root your Device

First and foremost, your device needs to be rooted. If you haven’t done so, then you may refer to our guide on How to Root Android via Magisk Patched Boot.img .

Backup Persist Partition - 15 Backup Persist Partition - 16

STEP 2: Install Android SDK

First and foremost, you will have to install the Android SDK Platform Tools on your PC. This is the official ADB and Fastboot binary provided by Google and is the only recommended one. So download it and then extract it to any convenient location on your PC. Doing so will give you the platform-tools folder, which will be used throughout this guide.

install adb platform tools windows - 17 install adb platform tools windows - 18

STEP 3: Enable USB Debugging

Next up, you will have to enable USB Debugging so that your device is recognizable by the PC in ADB mode. This will then allow you to execute the ADB Shell and henceforth the su command . So head over to Settings > About Phone > Tap on Build Number 7 times > Go back to Settings > System > Advanced > Developer Options > Enable USB Debugging.

Backup Persist Partition - 19 Backup Persist Partition - 20

STEP 4: Grant SuperUser Request

  1. Connect your device to the PC via USB cable. Make sure USB Debugging is enabled.
  2. Then head over to the platform-tools folder, type in CMD in the address bar, and hit Enter.
  3. This will launch the Command Prompt. Now type in the below command to open the shell environment. adb shell
  4. After that, execute the following command to invoke the superuser request su
  5. You will now get a prompt on your device, tap on Allow/Grant.

STEP 5A: Backup Persist Partition via ADB [Automated Method]

  1. Now execute the below command in the CMD window to take a backup of the persist partition su -c dd if=/dev/block/bootdevice/by-name/persist of=/sdcard/Download/persist.img
  2. The persist partition will now be backed up in the Downloads folder on your device. It is recommended to transfer it to your PC.

STEP 5B: Backup Persist Partition via SU [Manual Method]

  1. To begin with, type in the below command to open the shell environment: adb shell
  2. Then type in the below command. You’ll get a Magisk request, tap on Grant. su
  3. Now type in the below command to bring a list of all partitions on your device ls -la /dev/block/by-name
  4. Check out the sda address for your persist partition. In our case, it is sda8.
  5. Now use the below command, replacing location with the sda address: dd if= location of=/sdcard/persist.img bs=4096
  6. In our case, the aforementioned command will transform to: dd if= /dev/block/sda8 of=/sdcard/persist.img bs=4096
  7. The persist.img will be placed in your device’s Internal Storage. Transfer it to your PC.

How to Restore Persist Partition

So you have messed up the fingerprint on your device? Well, not an issue as you could easily fix it just by flashing the backed-up persist.img file.

  1. To begin with, carry out steps 1 to 4 as mentioned above.
  2. Then transfer the persist.img file to the platform tools folder on your PC.
  3. Next up, connect your device to the PC via USB cable. Make sure USB Debugging is enabled.
  4. Now head over to the platform-tools folder, type in CMD in the address bar, and hit Enter.
  5. This will launch the Command Prompt. So type in the below command to boot your device to Fastboot Mode adb reboot bootloader
  6. Finally, execute the below command to flash the persist.img file fastboot flash persist persist.img
  7. That’s it. You may now reboot your device to the OS via the below command- fastboot reboot

So these were the steps to take a backup of the persist partition on your Android device. If you hadn’t taken the persist backup beforehand and your device is currently facing fingerprint issues, then there’s no point in taking the backup of the persist partition and flashing it. This is because the said partition has already been corrupted. Moreover, you cannot use the persist partition image from another user, even if they have the same device and belong to the same region.

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Fix OnePlus Fingerprint issues without Persist backup

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Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

Fix OnePlus Fingerprint issues - 49

The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

Fix OnePlus Fingerprint issues without Persist - 50

STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
  • Take a Backup of Persist Partition: Fix Fingerprint Not Working
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Google preferred - 51 Google preferred - 52
  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

(Cancel Reply)

Δ

Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

Fix OnePlus Fingerprint issues - 53

The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

Fix OnePlus Fingerprint issues without Persist - 54

STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
  • Take a Backup of Persist Partition: Fix Fingerprint Not Working
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  • How to Enable Engineer Mode on any OnePlus device
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Google preferred - 55 Google preferred - 56
  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

(Cancel Reply)

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Fix OnePlus Fingerprint issues without Persist backup

In this guide, we will show you the steps to fix the OnePlus fingerprint issues without using the persist backup. OnePlus has long been among the most active players in custom development. Even though MSM Download Tool has become a thing of the past, but that hasn’t stopped tech enthusiasts from trying out new tweaks. You just need to take a backup of all the partitions and then dive deep dive into the technicalities of the open-source ecosystem.

While all the partition backups are equally important, but for me two really stand out among the crowds- the EFS partition that holds the IMEI number and the Persist partition that houses the fingerprint. This is because while you might be able to recover other partitions by flashing that partition file from a shared user firmware, but that would never work with the two aforementioned partitions as both are unique for every Android device.

But even then, we all have been on the receiving end of forgetting to take a backup or the backup getting corrupted or deleted unintentionally. Well, if you are also in the same boat, then this guide will help you out, at least with regard to fingerprints. In this guide, we will show you the steps to fix the fingerprint issues on your OnePlus device without using the persist backup file. Follow along.

  • Fix OnePlus Fingerprint issues without Persist backup STEP 1: Unlock Bootloader STEP 2: Flash persist of any other user STEP 3: ReCalibrate Fingerprint

Fix OnePlus Fingerprint issues without Persist backup

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The below process will require you to purchase an Optical Fingerprint Calibration [see STEP 3] which costs around Rs 1000 [$ 12.2] and in my case it proved to be a worthy investment in comparison to going to the official service center. Anyways, the choice is all yours. So decide accordingly and then proceed ahead. Droidwin and its members wouldn’t be held responsible in case of a thermonuclear war, your alarm doesn’t wake you up, or if anything happens to your device and data by performing the below steps.

STEP 1: Unlock Bootloader

To begin with, you’ll have to unlock the bootloader. This will wipe off all the data and might nullify the warranty as well. So if that’s well and good, then do check out our guide on How to Unlock Bootloader on any OnePlus Device [Video] .

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STEP 2: Flash persist of any other user

  1. Next up, grab hold of the persist.img file [you may ask it from any other user] corresponding to your device.
  2. Then download and extract Android SDK Platform Tools on your PC.
  3. Now place the persist.img file inside the platform-tools folder.
  4. Then enable USB Debugging on your device and connect it to your PC via a USB cable.
  5. Now open CMD inside the platform-tools folder and execute the below command to boot your device to Fastboot Mode: adb reboot bootloader
  6. Now type in the below command to flash the persist file: fastboot flash persist persist.img
  7. You may now reboot to the OS via the below command: fastboot reboot

STEP 3: ReCalibrate Fingerprint

Now comes the most important part of this guide. You’ll now have to re-calibrate the fingerprint on your phone. For that, you need to buy an Optical Fingerprint Calibration tool such as the Relife RL-071B or rl-071A. Once you have got this tool, let’s proceed ahead to fix the fingerprint on your OnePlus device.

  1. Bring up the dialer and type in the below code *#899#
  2. Now select AfterSale Devices Calibration. It will ask for a code, type in the below code and hit OK. 6776
  3. Skip [hit Pass or do a back gesture] all the other calibration tests until you reach fingerprint.
  4. On fingerprint calibration, press Start and follow the on-screen instructions: yellow – yellow, black -black, and stripped- blue [in my case].
  5. The stripped test usually never works in the initial attempts. You might get errors like Relative Illuminance Abnormal [in such cases, you just need to apply a little bit more pressure on the screen].
  6. So carry out this step a couple of times and ultimately you’ll achieve success. Once done, restart your device.
  7. Once the device boots up, you could now re-add your fingerprint from the Settings menu.
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  • AbdulWasay 3 years ago Reply OnePlus 8 in2017 after downgrade baseband unknown Solution plz Lucian 2 years ago Reply For nothing phone 1 there is a way to recover broken persist partition. I ended up with no fingerprint and no serial number.

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