I am coming to Surin city and province for less than a week. Can you recommend which voice, SMS and data service is best in this city? I just arrived from Phnom Penh and am disappointed with the AIS/1-2 Call service that I just revived. Much slower than Cambodia. On previous business trips I have had huge problems in reception, late SMSs, google maps taking five minutes to load, and molasses net connection. It's not like I need a LOT of bandwidth - just speed and reliability.

I don't care what works best in Bangkok and Pattaya - omly Surin and perhaps on the train to/from.

Suggestions?

I'm living in the northern Surin area. True-H was the first here to operate 3G and probably still is the best. I would choose True-H if I were in your shoes.