G820UM20u: AT&T LG G8 Firmware Update with Dec. 2020 Security Patch

AT&T LG G8 ThinQ LM-G820UM Firmware Update G820UM20u – Android 10 with December 2020 Security Patch.

The LG G8 ThinQ LM-G820UM (LMG820UM, G820UM) is now receiving a new firmware update from AT&T.

AT&T is now pushing a security patch update to its LG G8 ThinQ LM-G820UM (LMG820UM, G820UM) smartphone to version G820UM20u.

The update weighs in at 172MB and includes the December 2020 Android security patches.

On Feb. 25, 2020, The AT&T LG G8 ThinQ received the Android 10 OS Update which brings the device’s software version to G820UM20i!

  • Android version: 10.0
  • Software version: G820UM20i
  • File size: 2GB

AT&T LG G8 ThinQ Firmware Update G820UM20u

  • Release date: December 21, 2020
  • Android version:10
  • Security patch level (SPL): December 1, 2020
  • Baseband number: QKQ1.190929.002
  • Software version: G820UM20u
  • File size: 172MB
  • ChangeLog: December 2020 Security Patch

The Update is now available via OTA,  you can manually check for the update by going into Settings > General tab > Update center > System update > Check for the update!

For your information, the LG G8 ThinQ LM-G820UM (LMG820UM, G820UM) does not support software update through LG Bridge.

FAQ: Where I can download the AT&T LG G8 ThinQ Firmware?

There is no way to download AT&T LG G8 ThinQ KDZ Firmware from the LG server because AT&T LG phones support FOTA Update only.

As AT&T hosts the firmware on its own server, You can ask other AT&T LG G8 ThinQ users to capture the OTA Update download URL.


Need to download AT&T LG G8 Thinq  Drivers? You can get it here.

AT&T LG G8x ThinQ User manual / Guide

Source: https://www.att.com/device-support/article/wireless/KM1339228/LG/LGLMG820UM/