I am using gionee m2 . it have with 4500 mah battery and all features are good. Gionee m2 mobiles look is not good and waight is much of battery so mobile also heavy.i bought for this cell only for battery backup is good.it have not good looking mobile. Over all performances is not good some times it have little bit hang problems.just buy it only for battery backup not for other feature. App Installing time it show this app is unfotunately stopped. Not good.