How to block numbers on at&t cell phone?

AT&T provides a convenient feature of blocking incoming calls on a home or wireless phone. With this feature, users can specify certain phone numbers as their "blocked list." Anyone calling you from a blocked number will not be able to put his call through. following are few things you need to do while you block your at&t cell incoming calls, Talk to an AT&T customer service representative at 1-800-331-0500 for setting up AT&T Smart Limits for Wireless to your wireless account. Smart Limits for Wireless is a tool that allows you to set parental control on the phone and block up to 15 phone numbers from calling you. 2.Log in to your AT&T online account (see link in Resources). 3.Click "Account Overview" under the menu "My Account. "4.Place the cursor on "Quick Links." A drop-down list will open. Click "Manage AT&T Smart Limits for Wireless" from the list. This will display the phone number on which the Smart Limits facility has been activated. 5.Click "Blocked Numbers" to add a phone number to the Smart Limits block list. Enter the complete phone number of the person to block, including his area code. Click "Submit" to apply the changes.