How to unblock the reciever?

[techzeel]

If you don’t know how to unblock the receiver in order to fix the wireless customer is not available iphone issue then you must follow these steps:-
1. The first step is to go to the Settings of your iPhone.
2. Now tap on the Phone icon.
3. Then tap on the Call blocking and Identification to see the list.
4. Now finally tap on the minus sign which is located beside the number to unblock it.