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Post originale di: zatloukal.frantisek ,

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Hey,

It *IS* possible, thanks to XDA Dev mickybart.

Not easy process at all though, check [https://forum.xda-developers.com/showpost.php?p=65233973&postcount=3797|this guide] on XDA. Make sure to flash Android 7.1 in the end ([https://forum.xda-developers.com/xperia-s/s-development/rom-naosprom-xperia-s-t3462373])!

Your warranty will  be void by doing this. If you run into problems, do not hesitate to ask at that forum (the 7.1 ROM thread.)

PS: Rooted phone is necessary :)

Good luck!

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