iphone5s/iphone5c How to screen phone call blacklist

First step, screen phone number

1 We first go to the iphone's "phone"-"Recent call" click on the call to blacklist, click the "Details" icon, as shown in the picture

2. Then we will see at the bottom of "block this caller number"-"block contact", so this number is blacklisted, if we want to cancel we just click "Unblock this caller number", as shown in the picture

3. If it is not a common contact, we can contact the phone's "Contacts" Contacts-"Block This caller number"-"Block Contacts", as shown

Step Two, manage the shielding phone

1. Also we are in the mobile phone "settings"-"Phone"-"blacklist" here we will see all the blacklist of people.

2. Cancel just select the call to cancel the blacklist, and then swipe right, then you will see a "unblock", click can be canceled