Been playing with it for a couple days now.
When I dial *102*9# to check my own number, I get the message: "08XXXXXXXX active for OYOM5D but SIM card has not been registered."
So I sent an email to DTAC asking about it, and I'll give them credit, got an pretty quick answer.
"OYOM5D is year, month, date that you use this number. It is about 5 days. Please kindly be advised that now your number has not been registered yet, so you may register simcard by presenting your passport at dtac service hall nearby."
But now my question is, do I need to register my number somewhere? I'm nowhere near any DTAC service hall, no matter that it's supposed to be "nearby." What are the advantages? Necessities of registering it somewhere, somehow?
[Edit] took the phone number out and replaced it with Xs.
As I said, I'm a complete and total noob with these things, and basically dislike them intensely, so please, keep any answers as simple as possible, suitable for my simplicity!
Edited by monty, 2013-02-01 07:13:45.
Increased font size for readability.