– (Most Common) This opens the full engineering mode.
If the phone just starts charging when plugged in, you haven't hit the boot key. Common RDA boot keys are the 'Center/OK' button, 'Dial' button, or '*' and '#' together. coolsand rda imei repair code best
– 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
Miracle Box is arguably the best paid tool for Coolsand RDA IMEI repair. It has a dedicated "RDA" tab. – While this usually just shows the IMEI,
This is the official utility for RDA chips. It allows you to read and write NV data. Deep partition repair.
Ensure you have the RDA USB VCOM Drivers installed. Without these, your PC will not "see" the phone in repair mode.
Enter the 15-digit code found under your phone’s battery and hit . Restart the device immediately. Best Software Tools for Coolsand RDA Repair