Hi! I understand if you dont want to buy a phone for a couple of months, I wouldnt do it either. You can rent a phone, remember that the technologie for the phones its different than here. I used a rental company in the past for Europe, I havent tried them for other countries, but you should check with them how much it will be to rent a phone,
Cell phone rentals - Satellite phone rentals - GPS rentals
good luck!
