Hey, guys now I use this cell phone this phone battery backup is the best and ram also my friends says to me we like this phone but one friend say to me one problem on this phone is heating problem yes guys this is right I saw this problem but this phone is the best . Now I use 4gb ram/ 64gb internal memory this battery backup is 4100mah and camera 13mega pix. Rear camera 5 mega pix front camera this camera is very HD ( high definition) quality