Install Kernel Flashtool
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Install Kernel Flashtool Rating: 3,6/5 1657 reviews

Install Kernel Flashtool
Flashtool is a S1 flashing software that works for all Sony phones from X10 to Xperia Z Ultra. Why should I use flashtool?. Once bootloader unlocked, official sony tools do not work anymore. Using official sony tools, you can only upgrade. No downgrade possible.


Using flashtool, you can choose what to flash and what not to flash.