Sony Xperia Z1 C6902 / C6903 Dead Boot Repair


Download and run this s1tool: Download


Download Boot repair FileHere


Test point Image




In S1tool choose MSM8974 emergency mode, press Flash button, select correct APPSW .sin_file_set file

Press Testpoint Ready button



If your phone is in emergency mode just attach usb cable. If not perform all steps again (connect testpoint to GND and attach USB cable)

When drivers will be installed and phone will be detected, program will ask you to disconnect testpoint. If your phone is in emergency mode, just press Testpoint READY button. If no, disconnect test point from GND and press Testpoint READY button.


After that phone will load emergency s1 loader, re-enumerate usb, load s1 loader, update boot in your phone and flash selected firmware. When it's done and you have flashed all firmware parts (APPSW, FSP, ELABEL), phone will be fixed. If not, you must reflash it fully with Sony Update Service, Sony PC Companion or any other flasher like current Flashtool version

Note : if yu see Hardware id :xxxxxxxxxxx not supported

Sony Xperia Z1 C6902 / C6903 Dead Boot Repair