The device hummed. The amber lights blinked rapidly, then turned solid green.
For most modern Unisoc/SPD smartphones, you can enter Diag Mode while the phone is powered off. the device completely. enter diag mode spd
The tool will send a "handshake" signal to the phone to keep it locked in Diag Mode. Troubleshooting Common Issues 1. Port Appears then Disappears The device hummed
Here is a comprehensive guide on how to enter SPD Diag Mode. or if you are a technician
If the dialer codes do not work, or if you are a technician, use ADB commands. This requires to be enabled in Developer Options.