LM-X420 is LG K40 or LG K12 PLUS or LG Xpression® Plus 2

[Update] Below are the LG K40 LMX420 model variants launched in the U.S.

LG K40™ – Metro by T-Mobile



LG K40™ – U.S. Cellular



LG K40™ – Unlocked



LG Harmony® 3 – Cricket Wireless



LG K40™ – AT&T



LG K40™ – T-Mobile



LG Xpression® Plus 2 – AT&T


AT&T LG Xpression Plus 2 LMX420AS8 firmware Update brings March 2020 security patches

Several days ago, A New LG device with the model number ‘LM-X420″ received the Bluetooth SIG Certification.

Now We can confirm that the LM-X420 is indeed LG K12 PLUS, Thanks to a listing on Google Enterprise website.

According to the listing, the LG K12+ LM-X420 features a 5.7-inch display, 3GB of RAM and 32GB of Internal Storage, and it will ship with Android Oreo 8.1 OS out of the BOX.

In last month, The FCC has approved a variant of the LM-X420, namely the LM-X420HM.

We also found the LM-X420 model number in the list of Google Play Supported devices.

AS you can see from the above screenshot, The device code name is mmh4, LM-X420 is its model number and LG K12+ is the marketing name.

Our tipster also mentioned the following five model variants of the LG K12+.

LMX420N – South Korea

LMX420EM – United Kingdom -EE

LMX420BMW – Brazil

LMX420EM – European Countries


Maybe the LMX420N phone will be launched in South Korea as LGK12+, and in other markets, it will be sold as LG K40.