How to install T-Mobile One M9 Android 5.1 OTA update manually [Download]

T-Mobile HTC One is receiving the Android 5.1 update today, and in case you haven’t got the v2.7.531.6 yet, you can download the 5.1 OTA update right here (below). And then install the 5.1 update on your T-Mobile M9 right away using the guide below.

There is minimal preparation involved. If you never installed a custom recovery like TWRP and CWM on your device, you are good to install Android 5.1 update on your T-Mobile M9 right away. But if you did, you need to install the stock recovery back, as the OTA update requires stock recovery for installation.

Plus, the system partition shouldn’t have been mounted as read-write, or update will fail. In case you rooted or installed TWRP recovery, you will need to install the base firmware first of all, version 1.32.531.33 exactly.

Now, let’s see the installation procedure of your T-Mobile HTC One M9 5.1 update, provided you have HTC’s own stock 3e recovery installed, that comes by default on the device.

How to Update T-Mobile HTC One to Android 5.1 update using its OTA


Supported devices

  • T-Mobile HTC One M9
  • Don’t try this on One M9 or M9+ from any other carrier than T-Mobile!
  • Don’t try this one any other device of HTC or any other company!

Warning: Warranty may be void of your device if you follow the procedures given on this page. You only are responsible for your device. We won’t be liable if any damage occurs to your device and/or its components.

Backup your Android. Backup important files stored on your device before proceeding with the steps below, so that in case something goes wrong you’ll have backup of all your important files.

Step-by-step Guide

Step 1. Make sure you have the stock 3e recovery installed on your T-Mobile TC One M9. If not, then probably you have TWRP recovery installed, in which case you need to install stock system and stock recovery back. Use our T-Mobile One M9 Back To Stock guide for this.

Step 2. Download the OTA update file from the downloads section above. Don’t don’t extract it either.

Step 3. Connect your HTC One M9 to PC using USB cable.

Step 4. Copy the OTA file to your phone on the most parent folder, also called root folder of the storage, where you have folders like DCIM, Pictures, Music, etc.

Step 5. Disconnect your T-Mobile One M9 from PC, and reboot it into recovery mode (link). I’m writing the steps to do that below too.

  • Power off your device first. Wait for 4-5 seconds after screen goes off.
  • Now, press and hold Volume up + Volume down + Power button together until the device vibrates and then release the buttons. You will see white screen, this is bootloader mode.
  • Move the selection highlight to the option ‘Boot to Recovery Mode’ and select it using Power button. You will enter stock 3e recovery soon.

Step 6. In recovery, select the option ‘apply from phone storage‘. Now, browse through, and select the 5.1 OTA update. The update will start installing.

You must have an unmodified system, which was never mounted as read-write, and the software version 1.32.531.33 currently installed for this OTA to successfully install. If you never installed TWRP recovery to root your device, or install custom ROMs, then you have nothing to worry about, and the 5.1 OTA shall install all fine.

That’s it. The device reboot automatically after update is installed. Check the software version in Settings > About device > Software information. It should be 2.7.531.6. And Android version must be 5.1.


Well, if the OTA update did not install for you, then maybe you need to install back stock system and stock recovery again. See the link in step 1 above.

If you face any problems and need any help with installation of OTA update on your T-Mobile One M9, do let us know via comments section below. We will try our bets to help ya.

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  • nickmgray

    I’ve tried this method on two different stock T-Mobile M9 phones, but both return an “E: Failed to map file” error message when selecting apply from phone storage.

    Any suggestions?