Horrible battery backup .Its so horrible.takes 2n more than half hr to full charge.after that I sleep and becomes 89 % without any use in the next day morning I saw .battry does not last more than 3 days.im now very upset to buy this phone and to reject oppo a37.guys please suggest me wat should I do now .because I purchased it at 10000 by saving money more than 1 yr.and I dont want to leave this phone want to stay being happy with it only.