I had used intex aqua power+ this phone is very nice long time battery backup battery is 4000 mhz and back camera is 13 mega pixel and front is 5 mega pixel internal phone stroage is 16 gb and 2 gb ram 1.3 quad core process the oprating system os is lollipop 5.0 and 3g network display is 12.5 cm and long 5 cm very nice phone and phone peformance is very good long battery time this is very nice phone