A factory reset deletes all personal data. If the phone is not completely locked out, back up your photos, contacts, and documents first. Step-by-Step Guide: How to Use the SPRD U2S Diag Reset Tool
Without the correct drivers, the PC will not recognize the diagnostic port. sprd u2s diag reset tool
Performing a factory reset or wiping data will permanently erase all personal photos, contacts, and apps on the device. Always back up data beforehand if possible. A factory reset deletes all personal data
Removing the Google account lock after a factory reset. back up your photos