For many Coolsand RDA devices, a computer isn't always necessary. Technicians often start by trying secret dial codes directly on the keypad: Primary Repair Code: (often opens the interface for Secondary Repair Code: (often opens the interface for Standard Check: Always dial
– 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 . coolsand rda imei repair code best