FlashTool

FlashTool 0.9

Free
Flashtool is S1 flashing software that works for all Sony phones.
 
0.9.18.4 (See all)

Flashtool is S1 flashing software that works for all Sony phones from X10 to Xperia Z Ultra. They all use the S1 protocol for flashing firmwares. Flashtool can also easily unlock the bootloader of the phone using the BLU icon as far as the bootloader of your phone is unlockable.

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