LMX420MM

Official firmware #23023 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 16.07.2020. The firmware code is MTP from UNITED STATES. Instruction how to flash stock firmware on LG phones here
  • File name X420MM10q_00_MPCS_US_OP_0619
  • File size 2.81 GiB
  • Model LMX420MM
  • Operating system Android 9 Pie
  • Country United States United States
  • Region MTP
  • Description METRO PCS
  • Hash 22cae15778916c57d3fe9e141a227799

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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.
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