Different Area Code

The different between USA Phones Numbers and Malaysia Phone numbers are area code and privacy. Malaysia using 2 digits but US used 3 digits. If you call from foreigner country or internet call, their house will not appear phone number and the house owner before pickup your phone the system will ask the house owner to accept the call by identify the caller. The callers have to say their name only system will get thru or pass thru your call to your friends/relative house. How safe it is compare to Malaysia phone service and avoid those spam call. Hope that Malaysia Telekom will implement such a good system.