Iphone 5s is one of the best mobile of iphone company I use this mobile last 6 month I dont face singal problam on my mobile the mobile gives me best performence for gaming and all other stuff.The phone which I use is of 16 GB .The camera quality of this phone is best ever I saw. The screen cover with gorila glass helps my phone from damages .The size of the screen is best beacuse it is comfortable to use in a hand.When I lost my earphones I gone to service centre , the service I got was fantastic then any other companys service centre gave me.So this is the best phone.