In this tutorial, we are going to see the steps required for blocking contact in IOS 7 for iPhone. When a contact is blocked, you will not receive phone calls, FaceTime or messages from the contact. If you have recently bought iPhone 5S, iPhone 5C or upgraded your iPhone 4, iPhone 4S and iPhone 5 to iOS then follow these steps
Block contacts via Contacts Screen
Step 1: Tap the Phone icon and access the contact screen.
Step 2: Now tap the contact that you want to block.
This would display the following details screen for that contact
Step 3: Tap Block this Caller then confirm your selection.
And using Unblock this Caller option you can revert the changes.
Block contacts via Settings Screen
Step 1: Press menu button on your iPhone and tap Settings icon.
Step 2: In the Settings screen, scroll down and tap the Phone option.
Step 3: In the Phone Settings, navigate to Blocked. Then tap Add New and select the contact that you want to block
To remove a blocked contact, select the contact and swipe from right to left then select Unblock option.