I've had 2 problems since i upgraded my Z5c to android 7. My camera did not focus in any camera app, except when i used WhatsApp camera function. And my battery drain was as horrible as with all of you here. My wife, using a normal Z5, only had a batty drain issue. Both phones drained in under 16 hours, even when not in use. As for my phone; sony replaced, under manufacture warranty, the camera. Speedy service (only 5 work days between sending, repairing and recieving the phone). Very nicely done! They also addressed the battery issue by installing the latest android software. I was happy my camera worked like it should, but the battery drain remain. Somewhere i have read that putting the phone network (data link) on 3G+ might stop the drain. I tried that (my phone calls it WCDMA as preferential network setting), android version of my wife's Z5 calls it 3G+. On both phones we now have a normal battery use. In standby time my phone uses 1.7% of the battery capacity per hour (average measured over 97 hours with AccuBattery) Same results apply for the Z5 of my wife. For my wife and me the option worked great. I hope you guys will get the same results!
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