Samsung gakaxy s4 is a very good phone.He is used friendly.2gb ram and 16gb bilten memory in it.one foult in it.this phone battery is very bad 3 or 4 hour battery is low and shut down.this phone is very hot when I am used mobile internet and then I take the battery charge.when you parches the phone you be careful many high copy is available in market when you parchez this phones you check all the things and he is 2 model i.9500 or I 9505.