An IMEI can become corrupted or invalid for several reasons:
Repairing an IMEI on Chinese keypad mobiles typically involves using specialized software tools designed for devices with MediaTek (MTK) or Spreadtrum (SPD) chipsets. These tools are primarily used to that have become corrupted or display as "Invalid" or "Null" due to software errors . Popular Software Tools
In many countries (including the US, UK, and India), changing an IMEI number to mask a stolen device is illegal.
Before attempting to write or repair an IMEI, you must prepare your environment to avoid communication errors like "COM Port Failed" or "Device Not Found." china keypad mobile imei repair tool
You should only use these tools to restore the original IMEI printed on the sticker underneath the phone's battery.
It uses specific individual platform configurations to target the phone's calibration parameters over a COM port or USB interface.
Key Features:
Check the box next to IMEI in the Write Option matrix. If it is a dual-SIM phone, enable Dual IMEI .
Remove the back cover and note down the original and IMEI 2 numbers from the sticker. Insert a valid SIM card and power on the phone.
Designed for technicians to quickly repair devices without complex flashing processes. Top IMEI Repair Tools for Keypad Mobiles (2026) An IMEI can become corrupted or invalid for
Maui META is the official, authorized service tool developed by MediaTek for baseband and NVRAM calibration.
Locate the original 15-digit number printed on the white manufacturer sticker underneath the phone's battery. Step 2: Launch the Software
MRT Tool v6.0.0 is a comprehensive mobile service utility for technicians and repair shops. It centralizes many repair operations—including IMEI read/write/repair, FRP removal, bootloader unlocking, and NV backup/restore—into a single platform. Before attempting to write or repair an IMEI,
The most common symptom of a corrupted IMEI is a phone that can't connect to a mobile network to make calls, send texts, or use mobile data. You may also see "Invalid IMEI," "IMEI Null," or "Not Registered on Network" errors in the phone's status. In these situations, an IMEI repair tool can be used to write the correct, original IMEI back to the device's secure partition.
| Tool Name | Main Chipset Focus | Software License / Hardware Required | Key Features for IMEI Repair | | :--- | :--- | :--- | :--- | | | MediaTek (MTK) | Free (Official) Software Only | Official tool by MediaTek, modifies NV data, supports IMEI, Bluetooth, MAC address repair. Effective for many older keypad phones. | | SN Write Tool | MediaTek (MTK) | Free (Official) Software Only | Official MediaTek tool specifically for writing IMEI numbers and serial numbers. A simpler alternative to Maui META for basic IMEI repair. | | Infinity Box / Chinese Miracle-2 | MediaTek (MTK), Spreadtrum (SPD), RDA | Hardware Dongle (Paid) | A world-famous professional suite. Offers deep-level repair, including single and dual-SIM IMEI repair on MT6205 and MT6223 chipsets. Automatic phone structure detection supports many unlisted models. | | Chimera Tool | MediaTek (MTK), Qualcomm, Unisoc, and more | Software License (Paid) | A professional-grade suite for IMEI repair, FRP removal, and more. Enhanced patch-based IMEI support for newer MTK models. Supports 30+ manufacturers, eliminating the need for a hardware box. | | MRT Dongle | MediaTek (MTK) | Hardware Dongle (Paid) | Specializes in IMEI repair, flashing, and decoding for brands like Meizu, Xiaomi, and Vivo. Supports many MTK chipsets, from older ones to newer 4G LTE chips. | | UMT (Ultimate Multi Tool) | MediaTek (MTK), Qualcomm | Hardware Dongle (Paid) | A comprehensive hardware box for flashing, unlocking, and IMEI repair. Often used in professional repair shops for its broad device support and reliability. | | Android Win Tool | MediaTek (MTK), Qualcomm | Free Software | A Windows-based, all-in-one free utility for IMEI repair, FRP lock removal, and firmware flashing. A good free alternative for basic repairs. |