Block call/sms from specified phone number in iphone?

Can you please guide, is there any feasibility to track/get current inco开发者_如何学编程ming call. Is any framework exposing is this?

You will only be able to do such a thing on a jailbroken device.

See apps such as:
iBlacklist: http://www.iblacklist.com.br/
mCleaner: http://www.mcleaner.com/iphone_mcleaner.jsp

None of the public ones, as far as I know.