Cingular Internet settings for Windows Phone 8

Open cellular settings, in the App list, tap Settings > Cellular.

Select Data connection and turn this On.

Enable Highest connection speed

Tap Add Internet APN

Make below changes to the configuration

APN: wap.cingular
User name:wap@cingulargprs.com
Password: cingular1
Proxy server (URL):
Proxy port:
IP type: IPv4

Tap Save

Done.

Open cellular settings, in the App list, tap Settings > Cellular.

Tap Add MMS APN

Make below changes to the configuration

APN: wap.cingular
Username: wap@cingulargprs.com
Password: cingular1
WAP gateway (URL):
Wap gateway port:
MMSC (URL):
MMSC port:
Maximum MMS size: 1MB
IP type: IPv4

Tap Save

Done.