I suggest buying from either the Codetel (Claro) agent in the big Playero supermarket or from Orange in the plaza near Banco Popular. You will have to get service from one of them anyway, so you may as well buy your phone from them. Thiey usually include minutes with the phones they sell. If you buy from another dealer, you will still have to go to Codetel (Claro) or Orange and register the phone, get a number, etc.