Sony S1 Service Flash File Verified |link|

Download and install the official Sony Mobile USB drivers on your Windows PC so the computer can interface with the device in service mode. Step-by-Step Guide to Flashing the Sony S1

Perform a : Power off → Hold Volume Up + Power → Select “Wipe data/factory reset.” Then reflash the verified file with “Wipe userdata” checked in Flashtool. sony s1 service flash file verified

What or behavior are you currently seeing? Download and install the official Sony Mobile USB