Originally Posted by bp888
The way international roaming works with 1-2-Call is a little bit complicated. From the country where you are roaming, you dial an access code (sorry, can't remember, but it will be texted to you in every country you roam in), enter the mobile number of the person you wish to call in Thailand. That person will then receive a text asking if s/he would like to receive your call. If s/he answers yes, your telephone will ring and you can commence your roaming call. You pay for the toll charges. The other party pays only for air time. I've only tried this with the other party also a 1-2-Call customer. I don't know how this works if the called number is land line.
Both Singtel and M1 (which I use) in Singapore have this option while roaming as well. At least with these 2 operators, its cheaper to make a call while roaming using this option since you are charged Sintel/M1 IDD rates (as they originate the call to both parties) instead of roaming rates of whichever country you're in. Considering the high IDD rates in Thailand, its probably not a big saving.
I would think more people are interested in receiving calls on the Thailand number while roaming in another country possibly because:
1. You give the 1-2-call number to your colleagues/family back home in the US/wherever and you can take a short trip out to Vietnam/Cambodia/Laos and still be contactable at the same number.
2. You have a girlfriend in Thailand who will be able to dial a local number to reach you.
3. Same as 2, but you don't want to give her your home/mobile number in the US/wherever because you don't want her to track you down
