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Look for a device label containing string variants like , Spreadtrum COM , or SCI USB2Serial . enter diag mode spd
Flashing specific partitions without a full firmware update. (1:00 - 1:20) Look for a device label
Diagnostic Mode bridges the gap between your computer's servicing software and the device's internal modem. It exposes specific COM ports—most notably the port—which allow technicians and advanced users to repair corrupted IMEI numbers, bypass Factory Reset Protection (FRP), read network calibration data, and remove screen locks. Why Trigger Diagnostic Mode on Spreadtrum/Unisoc? The screen will usually stay black or show a "Charging" logo
The software should detect the device and switch it into Diag Mode. The screen will usually stay black or show a "Charging" logo. Method 2: Using Secret Dialer Codes
If you need help resolving a specific error, please let me know: What or script version are you using? What device model or chipset are you connecting?