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.
Connect the phone in "Boot Mode" (usually by holding the 'OK' or 'Call' button while plugging in the USB). 2. Miracle Box / Thunder Edition coolsand rda imei repair code best
Ensure you have the RDA USB VCOM Drivers installed. Without these, your PC will not "see" the phone in repair mode. The is a widely used chipset in budget-friendly
– 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 . – While this usually just shows the IMEI,
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