I have bought the samsung galaxy grand prime last year.
The phone is good looking nice and sleek. The phone inbuilt memory is also good that is 8gb. The phone extendable memory is also good its upto 64gb.
But as I have extended the memory to 16gb and downloaded some heavy games and application and the phone is not even reached 7gb out of 16gb the phone is getting slow. And the loud speaker sound is also very low. Sometimes the phone is in the pocket and I wont able to hear the ringtone.So my suggestion on samsung galaxy grand prime is dont buy.
