AT&T LG K40 (LMX420AS) Firmware Update X420AS20g – Android 10 with December 2020 Security Patch.
The LG K40 LMX420AS (LM-X420AS, X420AS) is now receiving a new firmware update from AT&T.
AT&T is now pushing a security patch update to its LG K40 LMX420AS (LM-X420AS, X420AS) smartphone to version X420AS20g.
The update weighs in at 135MB and includes the December 2020 Android security patches.
Last October, The AT&TLG K40 LMX420AS (LM-X420AS, X420AS) received the Android 10 OS Update which brings the device’s software version to X420AS20f!
- Android version: 10
- Software version: X420AS20f
- File size: 129MB
AT&T LG K40 (LMX420AS) Firmware Update X420AS20g
- Release date: December 14, 2020
- Android version:10
- Device: LG K40
- Model: LMX420AS,LM-X420AS, X420AS
- Security patch level (SPL): December 1, 2020
- Build number: QKQ1.200614.002
- Software version: X420AS20g
- File size: 135MB
- ChangeLog: Decmeber 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 AT&T LG K40 (LMX420AS) does not support software update through LG Bridge.
FAQ: Where I can download the AT&T LG K40 Firmware?
There is no way to download AT&T LG K40 lmx420as 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 LG K40 users to capture the OTA Update download URL.