Only issue I see so far is the battery problem. Not sure whether I messed up by doing a battery calibration. I thought it was supposed to help but it keeps draining - 4 % every hour or so - even when I turned off wifi and data overnight. Battery stats doesn't give me any pointers and CPU Spy tells me that 90% of the time the phone was in deep sleep. Not sure what is causing the drain.
You don't need to do a battery calibration. Android automatically does it when you charge to 100%.
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