T-Mobile and Cingular/ATT GPRS Settings : eBay Guides

In order to set up your new phone with your specific service provider,
you must input the below settings into your phones GRPS / Internet
settings. Because all phones are different, please refer to the manual
that came with your phone for details on changing GPRS / Internet
settings.

T-Mobile GPRS Settings:

GPRS Settings:
Primary IP address: 216.155.165.050
Port: 8080
Secondary IP address: Blank
APN name: wap.voicestream.com
Data bearer: GPRS
Profile name: GPRS
Username: Blank
Bearer: Data
Home page: http://wap.myvoicestream.com
MMS Settings:
WAP GW IP: 216.155.165.050
APN: wap.voicestream.com
Messaging Server: http://216.155.174.84/servlets/mms
Data Mode: Connection Oriented

Cingular/ATT GPRS Settings:
GPRS Settings:
Settings Name: Cingular Wireless Internet Express
Home Page: http://device:home or http://device.home
Session Mode: Permanent
Connection Security: On
APN: wap.cingular (lower case)
PDP_Type: IP
Gateway IP Address: 66.209.11.61
Port: 9201
Authentication Type: Secure
Login Type: Automatic
User Name: WAP@CINGULARGPRS.COM
(All upper case)
Password: CINGULAR1
(All upper case)
MMS Settings:
Service Name: MMS
Server Name (mmsc): http://mmsc.cingular.com
Web Session Name: MMS