AT&T LG G4 H810 started receiving Stock Android 6.0 Marshmallow H81020n update. The Stock Android 6.0 Marshmallow H81020n update for AT&T LG G4 H810 is rolling out via OTA and it you will be receiving the OTA update notification any time soon, the update size is about 950.45MB. The Stock Marshmallow firmware for AT&T LG G4 H810 is based on Android 6.0 Marshmallow and brought all new interface with multiple improvements and improved security patches.
LG Flashtool Method (Manual process): To manually update LG G4 via LG Flashtool requires Marshmallow firmware KDZ files [will be available soon] So lets begin with the OTA method.
Update Stock Android 6.0 Marshmallow on AT&T LG G4 H810 via OTA
To update AT&T LG G4 H810 on Android 6.0 Marshmallow H81020n firmware you don’t need to download multiple file for it, just you need your device and the working internet connection. You must also remember that OTA process works only on Stock devices which means your device is no longer rooted while you searching for latest firmware via OTA. If you think your device is rooted then don’t waste your time switch to alternative firmware update processes or if possible un-root it and then give it a try. But we don’t recommend you to get stuck in such a long un-rooting process just manually if the download link is available. If you think you are all set to go, then
Go to device Settings >> tap on About device >> Software updates.
Now tap it to check the latest available firmware. Upon it’s availability you will be prompted about the update, now what just tap “Download Now” to instantly download the firmware or “Download later” if you wish to download later. Some times it depends on the region too for example, if the update is released for a specific region but you are not present there it will take some delay until firmware update reaches that region.
If you have update your device via OTA please let us know..