Android Devices
Access the Settings menu.
Locate and select either Wireless & Networks, More Networks, or Connections.
Select Mobile Networks > Access Point Names.
Locate and select the option to add a new APN. This is usually accessed by a + symbol on the screen or by tapping the menu button.
Program each field using the settings below:
Name: phone
APN: phone
Proxy: Not Set
Port: Not Set
Username: Not Set
Password: Not Set
Server: Not Set
MMSC: http://mmsc.mobile.att.net
MMS Proxy: proxy.mobile.att.net
MMS Port: 80
MCC: 310
MNC: 410
Authentication Type: None
APN Type: default,mms,supl,hipri
APN protocal: IPv4
Bearer: Unspecified
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6. Save the changes to return to the APN's menu and select the new APN.