I like telenor's most attractive service which is called Telenor Web Self Service also known as Telenor web self care!
Many features are added to this service, e.g. you can block your SIM through this service online sitting at home,you can add more value added services, also you can deactivate Value added services, you can update your Contact details, Address, Email etc. You can give feed back to telenor.
Telenor also changed its address as http://wsc-wss.telenor.com.pk/