In this guide you would be able to install Official Android 6.0 Marshmallow v30B2 on AT&T LG G3 D850 via stock ported ROM. The Marshmallow firmware for AT&T LG G3 D855 is the ported ROM from the LG G3 D855 stock Marshmallow firmware, you can easily install it on AT&T LG G3 D855 by following the below description.
If you think you are good enough to perform such operation with your device then what are you waiting for? Just go ahead and follow the below description. In the previous articles we have mentioned the similar procedure for other devices now in this guide following the same process we will install Android 6.0 Marshmallow on AT&T LG G3 via ported ROM.
How to install Android 6.0 Marshmallow on AT&T LG G3 via ported ROM
Disclaimer: This guide includes flashing custom ROM on your device, it is not an official firmware but will flash the custom firmware. The writer is not responsible for any damage happens to your device during the whole operation neither we are forcing you to perform such operation.
Before you begin:
Installing custom ROM on your device needs some early preparations to be made and these preparations include;
A custom recovery is the most necessary element while installing custom ROMs or any .zip file in your device so a custom recovery like ClockworkMod or TWRP must be installed on your device.
Keep your battery charged or at least your device should contain at least 80% charge before the flashing operation.
Android USB drivers for your device should be installed on your PC, or you can download the latest USB drivers for your device from the below provided link.
Download USB drivers for LG
If the PC is unable to unable to detect your device after even after installing Android USB drivers for your device, then you need to perform one more step, Enable USB debugging.
To enable USB debugging in your device go to Setting >> Developer options >> USB debugging.
Sometimes “Developer options” are not visible in device settings menu, so what you need to do is, go to Settings >> About device >> Software information and there you will see an option build number. Tap it 7 times until a pop up arises with a message that you are now a developer, that’s it now go back and the Developers option is visible in the settings menu.
Create a Backup of your complete Android device
Backup is the most necessary part for your device you need to create a Nandroid backup of your device through custom recovery. We prefer Nandroid backup over other many apps because you don’t need to download multiple backup apps for specific purpose, the Nandroid backup will let you create backup of your device including; Messages, call log, settings and calendar including whole Android OS. Click the below link to create a Nandroid backup.
You can easily restore your backup when ever you wish to do so, this is good in aspect if your device accidentally met some issue during the flashing process.
Once you done with the above preparations now it’s time to flash Android 6.0 Marshmallow on your AT&T LG G3. Just go ahead and follow the steps in sequence to avoid any issue while flashing Android 6.0 Marshmallow on AT&T LG G3.
Process to install Android 6.0 Marshmallow on AT&T LG G3
Once you successfully downloaded the Android 6.0 Marshmallow zip file on PC, Now connect your device to PC and move the downloaded file on the internal storage of your device. [If you downloaded it via phone then skip this step]
Its time to reboot your device into recovery Mode, to do so you can search for it or use hardware buttons combination. (If your device is rooted then its super easy, just visit Google Play and download any third party reboot app for this purpose)
Once your device successfully boots into recovery mode, select the downloaded Android 6.0 Marshmallow.zip file and confirm it by swiping the slider for (TWRP) or yes for (CWM).
Once successfully done with the installation procedure simply reboot your device, please note the first boot up may take 5 to 7 minutes so be patient as things needs to be settled up for boot.
That’s it! Congratulation you have successfully installed Android 6.0 Marshmallow v30B2 firmware on AT&T LG G3 D850. Follow us on Facebook/Twitter/Google+.