I want to do my own call routing. When I lived in USA for a while, I had two numbers that all my contacts knew: one for HP and one for fixed line. When I left, I ported them both to a VoIP provider and now have them ringing on my Digi line (depending on caller identification and time of day).

Also, having full portability presupposes that calls to all numbers (fixed and mobile) are terminated at the same cost. Reducing mobile termination charges in Malaysia would improve competition.

Probably you just have to ask your friend.

When I visit the USA, I use a prepaid SIM from AT&T. Part of the deal is unlimited free calls to all other AT&T customers. But I never know until after I talk to someone if they were on AT&T - if I see that the last call cost was $0.00, they were. Otherwise not; no way to tell from the number, and no other indication given either.