LGROM / FIRMWARE

Stock ROM (KDZ) for LG K40 (LM-X420)

2212 views0

Here you can download the latest official Stock ROM (Firmware) files for the Stock ROM KDZ for LG K40 LM-X420. These files are essential for repairing software issues, fixing bootloops, upgrading/downgrading the OS, or restoring your device to its factory state.

Prerequisites & Preparation

  • Backup Data: Flashing will completely wipe all data on your device. Back up important files and settings before proceeding.
  • Battery Level: Ensure your device has at least 50% battery to prevent shutdown during the flashing process.
  • USB Driver & Tools: Install the correct USB drivers for your brand and prepare the flashing tool (Odin for Samsung, SP Flash Tool/QPST for Qualcomm/MTK, etc.).

CAUTION: Flashing official firmware carries a risk of bricking your device. Proceed with caution and at your own risk. addROM is not responsible for any damage caused to your device.

Download Stock ROM & Firmware

X420TM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420TM10n_00_TMO_US_OP_0422.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10m_00_TMO_US_OP_0305.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10l_00_TMO_US_OP_0118.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10k_00_TMO_US_OP_1119.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10j_01_TMO_US_OP_1031.kdzX420TMAndroid 01Google Drive | OneDrive
Stock ROMX420TM10g_00_TMO_US_OP_0406.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10f_00_TMO_US_OP_0218.kdzX420TMAndroid 00Google Drive | OneDrive
Stock ROMX420TM10e_00_TMO_US_OP_0203.kdzX420TMAndroid 00Google Drive | OneDrive

X420QN

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420QN20i_00_NAO_US_OP_0504.kdzX420QNAndroid 00Google Drive | OneDrive
Stock ROMX420QN20d_00_NAO_US_OP_1107.kdzX420QNAndroid 00Google Drive | OneDrive

X420EM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420EM20s_00_OPEN_EEA_OP_0224.kdzX420EMAndroid 00Google Drive | OneDrive
Stock ROMX420EM10d_00_OPEN_EEA_OP_0626.kdzX420EMAndroid 00Google Drive | OneDrive

X420ZM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420ZM20iX420ZMAndroid 00Google Drive | OneDrive
Stock ROMX420ZM20fX420ZMAndroid 00Google Drive | OneDrive
Stock ROMX420ZM20dX420ZMAndroid 00Google Drive | OneDrive
Stock ROMX420ZM10cX420ZMAndroid 00Google Drive | OneDrive

X420QM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420QM620j_00_CHT_US_OP_0422.kdzX420QMAndroid 00Google Drive | OneDrive
Stock ROMX420QM620i_00_CHT_US_OP_0308.kdzX420QMAndroid 00Google Drive | OneDrive
Stock ROMX420QM620h_00_CHT_US_OP_0108.kdzX420QMAndroid 00Google Drive | OneDrive
Stock ROMX420QM620g_00_CHT_US_OP_1028.kdzX420QMAndroid 00Google Drive | OneDrive
Stock ROMX420QM620c_00_CHT_US_OP_0204.kdzX420QMAndroid 00Google Drive | OneDrive

X420PR

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420PR10g_00_CLR_PR_OP_0525.kdzX420PRAndroid 00Google Drive | OneDrive
Stock ROMX420PR10f_00_CLR_PR_OP_0303.kdzX420PRAndroid 00Google Drive | OneDrive
Stock ROMX420PR10e_00_CLR_PR_OP_1128.kdzX420PRAndroid 00Google Drive | OneDrive

X420PMM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420MM10w_00_MPCS_US_OP_0422.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10v_00_MPCS_US_OP_0305.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10u_00_MPCS_US_OP_0118.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10t_00_MPCS_US_OP_1120.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10s_01_MPCS_US_OP_1031.kdzX420PMMAndroid 01Google Drive | OneDrive
Stock ROMX420MM10r_00_MPCS_US_OP_0805.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10q_00_MPCS_US_OP_0619.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10p_00_MPCS_US_OP_0408.kdzX420PMMAndroid 00Google Drive | OneDrive
Stock ROMX420MM10o_00_MPCS_US_OP_0205.kdzX420PMMAndroid 00Google Drive | OneDrive

X420HM

File TypeFirmware / BuildRegion / ModelOS VersionDownload Link
Stock ROMX420HM20aX420HMAndroid 09Google Drive | OneDrive
Stock ROMX420HM20aX420HMAndroid 05Google Drive | OneDrive
Stock ROMX420HM20aX420HMAndroid 04Google Drive | OneDrive
Stock ROMX420HM20aX420HMAndroid 03Google Drive | OneDrive
Stock ROMX420HM10aX420HMAndroid 04Google Drive | OneDrive

How to Flash LG Stock ROM / Firmware (KDZ / TOT)

To flash the stock firmware on your LG device using LGUP Tool (KDZ/TOT file), follow these steps:

Method 1: Using LGUP Tool (Recommended)

  1. Download and install the LG USB Drivers on your computer (available from LG’s official website).
  2. Download and install the LGUP Tool on your PC.
  3. Download the stock firmware in .kdz or .tot format for your LG device model.
  4. Launch LGUP as administrator.
  5. Power off your LG device completely. Connect it to the PC via USB cable while holding the Volume Down button to enter Download Mode. The LGUP tool should detect your device.
  6. In LGUP, click the folder icon next to the file path field and browse to select the downloaded .kdz or .tot firmware file.
  7. Select Upgrade as the operation mode (or Refurbish for a full wipe + flash).
  8. Click the Start button to begin the flashing process. Keep the USB connection stable.
  9. Wait for the process to complete. The device will reboot automatically once flashing is successful.

Method 2: Using LG Bridge (Official Method)

  1. Download and install LG Bridge from LG’s official website on your computer.
  2. Connect your LG device to the computer via USB cable.
  3. Open LG Bridge, select your device, and navigate to the Software Update section.
  4. Follow the on-screen instructions to download and install the latest available firmware for your device.
  5. Wait for the update to complete. Your device will reboot automatically.

You may also like

Subscribe
Notify of
guest

0 Comments
Newest
Oldest Most Voted