Just wanted to let you know fellas. In Ban kruat, they have 1 or 2 towers and have coverage of 5 km radius from Ban Kruat center. Nearby villages mostly doesnt have signal so it works only if you live in towncenter, but speed is great because nobody using it.
I also got TOT 3G signal in Buriram city center so they should have one base tower in every big towncenter.
I use iKool 3G simcard for 1000GB / 60 days / 199 baht. You can also buy 2 Mbits unlimited use 3G for 1490 baht if you are desperate (no adsl at home)