I recently purchased a galxy on7 mobile phone.trust me this is phone made me cry.it hangs like, i purchased it just not to play but to let it be in a corner hanged.
The user interface is good it is easy to use like all other samsung phones but it hangs a lot.internal memory is not at all full.
Sd card store is nill.but it hangs.samsungs worst phone is samsung galaxy on7.i wish I did bought htc .samsung is making phones like lava these days no standard nothing.i suggest not to buy galaxy on7.