Programmatically get the number of the incoming call

Question

How can I programmatically get the number of the incoming call from Background application ?

Answer 1

You cannot do this.

Apps running in the background can only do the following things: continue on something that won't last too long, play music or store current state in background.

Would you like it if one of your apps that you had been using picked up a phonenumber that called you and posted it on the internet? That may be one of the reasons why apple doesn't allow this…