Fix Android Flash Tool: Flash Failed Bytes sent does not match content length

In this guide, we will show you a couple of nifty workarounds that should help you fix the Flash Failed Bytes sent does not match content length error in the Android Flash Tool. When it comes to flashing firmware, Google has given us a great tool in the form of AFT. It has completely streamlined the flashing process- all that is needed is just a couple of clicks, and your device will be blessed with the latest OS upgrade.

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Along with that, the tool also gives quite a few granular controls- from choosing the desired firmware [Canary, Beta, Public] to flashing across both slots, from relocking the bootloader to disabling verity and verification, you can carry out all these tasks in just a few clicks. However sometimes it tends to hit a roadblock, and the error message doesn’t do any good in understanding the root cause of the problem or trying to find its solution. One such issue is

“Flash Failed Bytes sent does not match content length. Expected 3431451082, got 3505141712″. NOTE: The bytes value might be different in your case.

If you are also currently getting bugged by this, then this guide will make you aware of a couple of nifty workarounds that will help you address this bug. So without any further ado, let’s get started.

  • Fix Android Flash Tool: Flash Failed Bytes sent does not match content length FIX 1 FIX 2 FIX 3 FIX 4 FIX 5

Fix Android Flash Tool: Flash Failed Bytes sent does not match content length

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It is recommended that you try out each of the below-mentioned workarounds and then see which one spells out success. Moreover, before starting, please take a complete device backup. 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.

FIX 1

First off, try using a differet USB cable as well as a USB port. In most cases, a faulty USB port and/or cable is the culprit behind these issues. So change them and then see if it fixes the issue.

FIX 2

It is also recommended to make a swtich to another browser. Talking about browsers, please disable all your VPNs, porxues, ad-blockers, and other web elements while you’re trying out this tool. This is because they tend to conflict with the flashing process by not allowing all the elements of the tool to load properly.

FIX 3

Make sure that there’s sufficient space available in your hard disk. This is because the tool downloads and temporary stores the firmware on your PC only. So if there’s not enough space remaing, it wouldn’t be able to download and subsequently flash the file.

FIX 4

If possilbe, try using a different PC and then retry the flashing process.

FIX 5

If none of the aforementioned tweaks worked for you, then you should consider flashing the firmware. For that, download the factory image, extract it, and launch the flash_all.bat file. Your device should obviously be booted to Fastboot Mode before starting the flashing process.

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