S1boot Fastboot Driver -

In the same Developer Options menu, toggle on OEM Unlocking (if available and supported by your carrier).

Installing the is the "gatekeeper" step for Sony device customization. While Windows' security features make it slightly more complex than it used to be, disabling signature enforcement and manually pointing to the driver files will solve the issue 99% of the time. Once the blue LED stays lit and your PC recognizes the S1 interface, you are ready to flash kernels, recoveries, and ROMs to your heart's content. s1boot fastboot driver

Power delivery issues or bad data lines in the cable. In the same Developer Options menu, toggle on