Mrs Doakes just got a new iPhone last week. She was in Central World (probably near Siam Square) and did have 3G coverage...also free WiFi.

I think that she has True. I know that her other phone is DTAC and I know the new phone doesn't have the same carrier.

The lack of 3G outside the city is true, but at least for her there was 3G inside the limits. She loves it, but boy was it expensive in Thailand!!