Hi there , i just made an account here for ios 10.2.1 battery problems on my iphone 6 , i got this phone for just 4 months(brand new ) . On ios 10.1 i had no problems battery life was very good( better than my samsung s4) , but after 10.2.1 its a wreck ( ios 10.3 beta 4-5 too) . Last night i observed an abnormal usage , battery went from 65% to 25% in the morning and my phone usage shown in battery was 5,32 hours ( i used it aproximately 1.9 hours ) .
Can i somehow downgrade to an older version like 10.1 , 9 and still sign in to icloud ? In my Country( Romania) we dont have apple shops only resellers . Battery wear appear to be 0.6% in apps(its only 4 months used phone )
Thanks .