New answers tagged sony-xperia-arc
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If your phone's OS still stay in Android 2.3, Flashtool is your best choice, you can google it, and some tutorials you can find in XDA forum.
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Easiest way is unlock the bootloader and install a CWM or TWRP added kernel. Bootloader unlock wipe user data. Also rooting, unlocking bootloader voids the warranty.
First unlock the bootloader tutorial. :- http://www.androidgadgematic.com/2012/11/how-to-unlock-any-sony-xperia-bootloader-easily.html .
Download and copy SuperSU zip file into your SD card.
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