: Enable the PC to "talk" to the phone's bootloader.
The "Sony S1" is a technical term primarily associated with the used for Sony Ericsson and Xperia devices (roughly 2010–2013), as well as the codename for Sony's first major foray into the tablet market, the Sony Tablet S . sony s1 service flash file verified
The verified file usually comes in a .zip or .7z archive. Extract it to find the .ftf file (for Flashtool) or the specific image files. Step 4: Enter Flash Mode : Enable the PC to "talk" to the phone's bootloader