AT&T LG K40 LMX420AS Specs

AT&T LG K40 LMX420AS Specs

Carrier: AT&T

Model: LMX420AS / X420AS

OS: Android 9.0 Pie

CPU:MediaTek Octa-core (Up to 4 x 2.0 GHz + 4 x 1.5 GHz)

Display: 5.7″ HD+ FullVision™ 1440 x 720 pixels


Internal Memory:32 GB

4G LTE Bands: LTE Bands 2/4/5/12/14/29/30/66

Battery: 3,000 mAh Non-Removable

The LG K40 is now available at AT&T. It comes with Android 9.0 Pie OS out of the box.

AT&T LG K40 LMX420AS User manual

Visit LG official Support for AT&T LG K40, to download ATT LG K40 owners manual

AT&T LG K40 LMX420AS USB Drivers

The latest LG USB Drivers Ver 4.4.2 can be download via this link.

AT&T LG K40 LMX420AS Stock firmware

There is no way to download the stock kdz firmware for AT&T LG K40 Smartphone.

Maybe you can use LGUP 1.16 to dump the firmware of ATT LG K40.