Select the RDA tab -> Choose "Write IMEI" -> Input numbers -> Click Start. Pros: High success rate and supports various boot pins. 3. Infinity-Box CM2RDA
This is the official utility for RDA chips. It allows you to read and write NV data. Deep partition repair.
The is a widely used chipset in budget-friendly feature phones and some older smartphone models. If you find your device displaying an "Invalid IMEI" error after a firmware flash or a factory reset, you likely need the specific service codes to restore its identity. coolsand rda imei repair code best
For professionals, the CM2RDA module is the most stable. It can rebuild the security area of the phone without needing the original backup. Vital Troubleshooting Tips
Miracle Box is arguably the best paid tool for Coolsand RDA IMEI repair. It has a dedicated "RDA" tab. Select the RDA tab -> Choose "Write IMEI"
If the keypad codes do not work (which happens if the manufacturer has disabled the Engineer Mode), you will need to use a PC-based tool via a USB data cable. 1. RDA Service Tool (Free)
Enter the 15-digit code found under your phone’s battery and hit . Restart the device immediately. Best Software Tools for Coolsand RDA Repair Infinity-Box CM2RDA This is the official utility for
– While this usually just shows the IMEI, on some RDA firmware, pressing "Options" or "Edit" here allows for direct input. *#9646633# – Common for generic Chinese chipsets. *#8232# – Specific to certain RDA8851 models. *#3646633# – Standard MTK/RDA hybrid code. How to use the code: Open the Dialer/Keypad. Type the code carefully. Navigate to Para Set or Connectivity . Select IMEI or Write IMEI .
– (Most Common) This opens the full engineering mode.