LMX420MM

Official firmware #21503 for X420MM - LG K40

Download the latest versions of firmware for the LG K40, but don’t forget to look into whether the model number of your device corresponds to the indicated one X420MM. The operating system version of the given firmware is Android 9 Pie, with build date 26.12.2019. The firmware code is MTD from UNITED STATES. Instruction how to flash stock firmware on LG phones here
  • File name X420MM10n_00_MPCS_US_OP_1129
  • File size 2.77 GiB
  • Model LMX420MM
  • Operating system Android 9 Pie
  • Country United States United States
  • Region MTD
  • Description METRO_DEMO_DISPLAY
  • Hash 3ab53b80f7a09ed2185cc5f242915784

1. Check reCAPTCHA

2. Press to download

Fast download
Just a moment...

Instructions

LG UP
  1. Download to your PC: LG UP 1.14 or LG UP 1.16.
  2. Next download and extract the KDZ firmware file.
  3. LG uses KDZ format when posting official firmware releases.
  4. Now turn off your device and enter Download mode.
  5. Press and hold the Volume Up key and then connect USB cable.
  6. Open LG UP next choose "Upgrade" and select your KDZ file(You can choose KDZ file here).
  7. Finally click on "Start" key. Your device will now reboot and disconnect from the PC.
LG Flash Tool 2014
  1. Download to your PC: LG Flash Tool 2014.
  2. Next download and extract the KDZ firmware file.
  3. LG uses KDZ format when posting official firmware releases.
  4. Now turn off your device and enter Download mode.
  5. Press and hold the Volume Up key and then connect USB cable.
  6. Open LG Flash Tool 2014 and select your KDZ file (You can choose KDZ file here), choose type "CDMA" then tap "CSE Flash".
  7. Next select "Different Country" and "English" language.
  8. Finally click on "OK". Your device will now reboot and disconnect from the PC.
To Top
GDPR