Chiang Mai - Post Report Question and Answers
Do you have any recommendations regarding mobile phones? Did you keep your home-country plan or use a local provider?
It's probably easiest to use a local SIM card. - Mar 2019
It seems that everyone in Chiang Mai has a cell phone, from the businessman to the person mowing your lawn. Cell phones are available everywhere and in every price range. You can buy minutes at any convenience store or sign up for monthly service. - May 2007