Process on how to update AT&T LG G2 D800 smartphone to Android 6.0.1 Marshmallow AICP 11.0 ROM.

AT&T variant of LG G2 with model number D800 has got a new Android 6.0.1 Marshmallow based custom ROM developed by the AICP Android developers. This is the unofficial build of the ROM and it's in the initial stage of development so it can be assumed that it may not be fully stable and not every ROM functions will work correctly.LG G2

So, if you own LG G2 D800 then you can flash the ROM and experience the new Android version on your device. Once you flash this ROM your device warranty will void as you need to root your device to flash this ROM and also have custom recovery installed on your device.

But flashing this ROM must be for experience purpose for now as the ROM is not stable, as new builds are released in the coming future the ROM will become stable.It can then be used for daily run.

For now if you like to flash the ROM then you can follow the steps mentioned below without hesitation and hurry.

Preparing your Phone:

  • Instructions limited for AT&T LG G2 D800 only.
  • Phone should be rooted and its boot loader must be unlocked.
  • It should have a custom recovery tool like CWM or TWRP installed on it.
  • It's battery should be fully charged to avoid problems during the process.
  • Phone data and current ROM (Nandroid back up) must be backed-up to retrieve it in future.
  • Phone's USB drivers must be installed on the computer.
  • USB debugging mode should be enabled on the Phone (Settings > Developer options > USB debugging).USB Debugging

Installing Android 6.0 Marshmallow AICP Custom ROM

  1. Download the latest Android 6.0 Marshmallow based AICP ROM from here.
  2. Download the Google App's for LG G2 if not available along with ROM, from here.
  3. Connect the device to computer and transfer the downloaded files to phone's internal storage.
  4. Switch off the device and reboot into Recovery mode by pressing and holding Volume down button and power button.
  5. Your device will enter into boot-loader mode and select recovery mode by scrolling down and press power button.
  6. After entering into recovery mode, first perform a full data backup by selecting Backup and Restore option in the menu.factory reset
  7. Now perform a full data wipe by choosing Wipe data/Factory reset option from the menu.
  8. Similarly perform Wipe cache partition and Dalvik cache wipe (Advanced option) one after another by selecting respective options.How to reboot from recovery mode
  9. Now return to main recovery menu and select Install Zip from sdcard from the menu.
  10. Choose the file from the internal storage and flash it.
  11. Repeat the step 9 for selecting Google App's file and flash it.
  12. After flashing both the files return to recovery menu and select Reboot system now option.

Note: Images shown are from CWM recovery

Your phone will now boot and it will be operating on Android 6.0 Marshmallow, to check the status go to Settings > About Phone > Android Version.