Thailand

Dtac
No 3G, but EDGE coverage is pretty much countrywide.

Default data rate

 * ฿ 0.25 / minute
 * 128 Kbps to 256 Kbps, no data limit

Data feature packs

 * ฿ 69 / 300 minutes

Availability

 * Can be purchased from Dtac Shop.

SIM sizes
It is possible to exchange existing Dtac SIM with MicroSIM.
 * SIM available as "Happy Internet"
 * MicroSIM available as "Happy MicroSIM" but with the same plan. (Unlisted on the website)

Tethering
Available. Carrier Update may required for iPhone users.