I have been using this smarphone from 1 year and I dont have any problem yet it gives you most highest features its have 1 gb ram, 1.3 quad core processor, 5 mp rear camera, 2 mp front camera, 8 gb internal memory, 32 gb external memory, 2000 mah battery, marshmallow 6.0 all in rs 4000 I think this mobile can buy everybody because it so cheap