My friend amit bought oppo A37 mobile, He found network signal is very weak when compare to other Mobile for eg. Other Mobile shows 4 bar, but oppo shows only 1 or 2 bar. Browsing also delay to load 3 mins for Google homepage. Last night he encountered some prob. noticed that when mobile data on it over heats so hot that he got scared it might explode. After usage of 5min blue colour appears at the corners of the phone which continuosly increases. So I dafinately suggest you to go with branded one.