In my travels around Thailand i found these vendor machines very popular around the city malls and train station i always thought they were ATM machines but actually they are for topping up credit on your mobile phones at what ever amount you like very handy. These are the two most popular phone companies over here in Thailand , True and AIS.
Entry No - 2.
Interesting!
Saves lining up in cues in phone shops or 7/11 Stores !!