Many of the photos I take are with my iPhone including this one of the kiosk (near Gulshan 2 circle on the DIT 2 market side of Madani Avenue) where one can purchase scratch off top up cards for one’s prepaid iPhone. If your phone is unlocked, you can buy a sim card, some scratch off cards, and after some set up, you are good to go. I’d guess I use around 300 Taka per month ($4) on my phone and Internet. The sim card cost 250 Taka. You can also go the post-paid route and go to Grameen phone, give them copies of your passport, a photo, and then you will receive a bill monthly.