after download iOS 10.2 beta 3, my iphone's turning off when it's with 12-10% of battery.Someone else? If positive, please say how did you fixed it.
PS: i'm getting worried about it.
iphone 6s battery life
Betas have long been notorious for lacking release-level power/battery management. Best to avoid betas if this is an issue.
There is an know issue with 6s battery's doing this. Apple are offering free replacement if your serial number qulaifies.
https://www.apple.com/uk/support/iphone6s-unexpectedshutdown/
J