Free WiFi at Major Thai Airports

I read the other day about free high speed WiFi at most of the major airports in Thailand. I didn’t think much about this as I’ve heard about these pipe dreams before. But I’m here at Don Mueang now using their Internet. It’s both free and fast. Just look for AOT free WiFi by True. You have to register your name & passport but it all takes less than a minute. They even log in for you. Now I have free internet for 120 minutes. Should be the same at all AOT airports