Erm... must wait.
I remembered I called around late morning, around 10 or 11 plus am.
They say should be activated around 5pm in the evening. If it's
not, call and complain (actually, no, just call and ask why, not
complain).
They very nice de. 
But... mine was activated before 5pm. hehe. Around 4 plus I can
surf the Net liao. 