How available are iPhone 4S micros SIMs in Cambodia?
 

Hi there, I'm travelling to Cambodia and would like to buy a local micro SIM for my iPhone 4S to access the data network. But I don't know if you can by these SIMs are available in Cambodia, and if so, how readily.
Also, if I do manage to get a Cambodian iPHone 4S micros SIM, how expensive is data access?
Many thanks for any advice / tips
Susie