T-Mobile seem to be quite active in releasing a software update for its devices, after the Galaxy S6 family, now the LG V10 (H901) that gets the official update to Android 6.0 OS. In the States, this variant is not the first device that gets an OS upgrade, the Verizon wireless variants (VS990) already got it last month. For enthusiasts who want to root Marshmallow for T-Mobile LG V10, you might have to wait for a while, considering that the bootloader will be relocked once the update succeeded.
The Marshmallow update released with H90120e software version, and according TMo’s official support site, the 20e is the first software update that received by this smartphone. The Android 6.0 brings several new features such as Doze for extended battery life, Now on Tap for useful information, and improved app permissions for better security and privacy. In addition to those main features, T-Mobile also added some extra features such as Advanced Messaging and T-Mobile Video calling.
There are two options for you to be able to get the update for LG V10, the first is via OTA, you do not need to do anything because you’ll get a notification directly on your phone as soon as the update is available. Alternatively, you can also download and install the OTA via official desktop app called LG Bridge, as the name implies, you have to run it via computer with Mac OS X or Windows.
Before performing an update, make sure that your phone in a stock state, without root access or custom recovery, since the installation of the update will be declined and new problems might show up. If you already do this, it could help you to restore the phone system back to stock condition. As we said before, until now there has been no successful users regain root after updated T-Mobile LG V10 to Android 6.0 Marshmallow. Some people suspect this is because the bootloader is relocked while on system updates. Not only that, some fastboot commands are unable to execute.
Whereas, the fastboot commands are needed in bootloader unlock procedure. Locked bootloader means no custom recovery (TWRP) which also means that we can not flash SuperSU zip on this phone. For those who do not know, the Android 5.1.1 Lollipop root method needs some fastboot commands line to unlock the bootloader and boot TWRP recovery.
Update! Root now possible with stock rooted Android 6.0 ROM by XDA Recognized Developer @Eliminater74.