IMEI (International Mobile Equipment Identity) loss is a common issue on Xiaomi devices with MediaTek chipsets. This often happens after flashing firmware, bootloader unlocking, or failed OTA updates. When the IMEI becomes null or invalid, your phone may lose cellular connectivity entirely.

In this guide, we'll walk through the complete IMEI repair process for Xiaomi MediaTek devices using CheckerTR PRO.

What Causes IMEI Loss on Xiaomi MediaTek Phones?

Common scenarios that lead to IMEI corruption or loss:

  • Bootloader unlocking — Official or unofficial unlock can corrupt the NV data partition
  • Cross-region firmware flashing — Flashing a ROM meant for a different region (e.g., China ROM on a Global device)
  • Failed OTA updates — Interrupted system updates that damage the modem partition
  • FRP bypass attempts — Aggressive bypass methods that modify system partitions
  • Persistent root removal — Improper Magisk/KernelSU uninstall

⚠️ Warning: Always back up your NV data (IMEI / Persist partition) before modifying your device. Without a backup, repair is still possible but may require more steps.

Devices Supported

This guide covers Xiaomi, Redmi, and POCO devices with MediaTek chipsets:

  • Xiaomi: Redmi Note 12/13 series (MTK), Redmi Note 11 series (MTK), Xiaomi 12T
  • POCO: POCO M4 Pro, POCO M5, POCO X4 Pro (MTK variants)
  • MediaTek Chipsets: Helio G85/G88/G96, Dimensity 700/900/1080/1200

Step 1: Prepare Your Device

  1. Enable USB Debugging: Go to Settings → About Phone → Tap MIUI version 7 times → Developer Options → Enable USB Debugging
  2. Install Drivers: Ensure MediaTek USB VCOM drivers are installed on your PC
  3. Charge your phone: Ensure at least 60% battery level
  4. Backup your data: Use CheckerTR PRO Backup Module to create a full backup

Step 2: Download CheckerTR PRO

Download the latest version of CheckerTR PRO from the official GitHub repository. Install the software on your Windows PC.

Step 3: Connect and Detect

  1. Launch CheckerTR PRO
  2. Connect your Xiaomi device via USB cable
  3. From the main menu, select the IMEI Repair Module
  4. Click Detect Device — the software will automatically identify your chipset (MediaTek)

💡 Tip: If the device is not detected, try a different USB cable or port. MediaTek devices in BROM mode sometimes require a USB 2.0 port.

Step 4: Repair IMEI

  1. Once the device is detected, you'll see the current IMEI status
  2. Enter the correct IMEI numbers for IMEI 1 (Slot 1) and IMEI 2 (Slot 2)
  3. Verify the numbers match the device's original label (check the box or under the battery)
  4. Click Repair IMEI
  5. Wait for the process to complete — this usually takes 30-60 seconds

Step 5: Verify

  1. Reboot your device
  2. Dial *#06# to check IMEI numbers
  3. If both IMEIs appear correctly, the repair was successful
  4. Test cellular connectivity by making a call

✅ Success Rate: CheckerTR PRO's IMEI repair module has a >95% success rate on Xiaomi MediaTek devices. If the first attempt fails, try using BROM mode (power off device, hold Vol Down, connect USB) and repeat the process.

Troubleshooting

"IMEI repair failed"

Try the following: Reboot into BROM mode, use a different USB cable, disable driver signature enforcement on Windows, or try from the "Advanced Mode" in CheckerTR PRO.

"Device not detected"

Install MediaTek VCOM drivers manually. Disable Windows driver signature enforcement. Try a USB 2.0 port.

"IMEI repaired but no signal"

This may indicate a hardware issue. Try reflashing the modem partition using CheckerTR PRO's Xiaomi Module → Flash Modem Partition.

Preventing Future IMEI Loss

  • Always create an NV backup before flashing or unlocking
  • Use region-specific firmware for your device
  • Avoid unofficial bootloader unlock methods on MediaTek devices
  • Keep a backup of your persist partition
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