Cannot Boot to Fastboot Mode on OnePlus 15? Here’s Why [Fix]

Making use of the Deep Test APK to unlock the bootloader on your OnePlus 15 [China variant] isn’t the only complicated thing. Infact, it is the least complicated out of all the things, as things only begin to go south from here onwards. Once you flash OxygenOS on top of your ColorOS device, you can then easily relock the bootloader as well.

Infact, many sellers like TradingShenzhen already sell the device this way only. The benefit is that you can easily run all the banking and payment apps of your choice without the need to worry about Play Integrity issues. However, this is causing quite a troublesome issue for the users . But why is that the case? Let’s find out.

What’s the Issue?

cannot boot oneplus 15 to fastboot mode - 1

Once the OnePlus 15 is converted from ColorOS to OxygenOS and the bootloader is locked, you will no longer be able to access Fastboot Mode! Neither the hardware key combination nor the adb reboot bootloader command will work. As a result of this, you wouldn’t be able to unlock the bootloader [because booting to Fastboot is the first step in the unlocking process]. So what can be done then?

How to Fix Being Unable to Boot to Fastboot Mode on OnePlus 15

In the current scheme of things, your only way out is to convert your device back to ColorOS and then use the Deep Test APK to unlock the bootloader . But how can we do a conversion from OxygenOS back to ColorOS on a locked bootloader? That’s an excellent question! The only way to do so is by taking the EDL route. You’ll have to flash the ColorOS firmware on your device using an EDL Tool.

At the time of writing this article, we do have an EDL Tool available for numerous OnePlus devices . So do give it a try right away and see if it works for you or not. If it does, then you’ll b back to ColorOS within minutes, after which you can then unlock the bootloader using the same way you did earlier [via the Deep Testing app ]. Then switch back to OxygenOS, but this time around, do not relock the bootloader because then you’ll have to deal with the same issues all over again.

Cannot Boot to Fastboot Mode on OnePlus 15 - 2
  • Don’t Buy a Chinese ColorOS Converted to OxygenOS OnePlus 15 with Locked Bootloader
  • Open Third-Party Apps using Plus Key on OnePlus 15 [No Root]
  • How to Force 165Hz Refresh Rate on OnePlus 15
  • How to Unbrick OnePlus 15
  • Guide to Flash Fastboot ROM on OnePlus 15
  • How to Root OnePlus 15 via Magisk/KernelSU/APatch
  • How to Unlock Bootloader on OnePlus 15 [In-Depth Test App]
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