Power off the mobile device completely. Remove and reinsert the battery. Hold down the device’s designated boot key (often the Center/OK key, the Call key, or the Volume keys) while plugging the USB cable into the PC. Step 6: Execute the Repair Command
They can read and write directly to the non-volatile memory partitions.
The Coolsand RDA IMEI Repair Tool does three things: coolsand rda imei repair tool
Reads the existing firmware from the Coolsand/RDA chip for backup purposes.
Check your Windows Device Manager. If you see a yellow exclamation mark, your Coolsand USB drivers are not properly installed. Try a different USB port or hold a different hardware boot key combination when plugging in the cable. Write Error / Flashing Fails halfway Power off the mobile device completely
| Feature | Official RDA IMEI Tool | Infinity CM2 Tool | ProductLineTool (wimei) | RUDRA (Open Source) | | :--- | :--- | :--- | :--- | :--- | | | Dedicated IMEI/MAC writing | Full service & repair suite | Specialized module IMEI writing | Low-level firmware flashing | | Hardware Required | None (Software only) | CM2 Dongle (Hardware key) | None | None | | Cost | Free | Paid (~$143.00) | Free | Free | | Chip Support | RDA only | RDA, Coolsand, MTK, SPD | Specific RDA modules | RDA Feature Phones | | Multi-SIM IMEI | Yes (Up to 4) | Yes (Up to 4) | Yes (Dual) | Unknown | | Target User | Technician, Advanced user | Professional Repair Shop | Module Technician | Developer, Hobbyist | | Legal Tool Name | "RDA IMEI Tool" | "Chinese Miracle-2" | "wimei.exe" | "RUDRA" |
This lightweight, portable Windows utility is built exclusively for rewriting IMEI numbers on RDA-based feature phones. It features a simple user interface consisting of COM port selection, baud rate configuration, and text fields for entering the 15-digit IMEI strings. 2. Miracle Box (or Miracle Thunder) Step 6: Execute the Repair Command They can
What is the of the phone you are trying to fix?
Clears corrupt user data blocks that interfere with hardware registers.
Remember: Always repair IMEI numbers to their original, manufacturer-assigned values and respect the laws of your jurisdiction regarding mobile device modification. With the right tools and knowledge, you can keep your devices connected and functional for years to come.
: The IMEI number on these devices is stored in a dedicated, writable section of the phone's flash memory (often within the NVRAM or calibration data parameters). Software glitches, corrupted firmware flashing, or accidental formatting can wipe this sector, resulting in an "Invalid IMEI," "Null IMEI," or "00000000000000" reading. Core Features of a Coolsand RDA IMEI Repair Tool