Same problem here. I have bought two xperia z3+ phones for my kids. The touch screen freezes with regular intervals (approx. 2-3 times per week) on both phones after update to Android 7. It never happened before upgrading to Android 7. A hard reset fixes the issue -- until next time it freezes! :-( I really hope that Sony will fix this annoying problem. Does Sony support downgrading til Android 6?
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