According to the site ‘http://www.webmessenger.com/support/APN.jsp’.
Carrier:AT&T (USA)
APN:proxy
User name:
Password:
Carrier:AT&T (VPN) (USA)
APN:public
User name:
Password:
Carrier:Bell Mobility (USA)
APN:internet.com
User name:
Password:
Carrier:Cincinnati Bell (USA)
APN:wap.gocbw.com
User name:cbw
Password:
Carrier:Cingular (USA)
APN:isp.cingular
User name:ISPDA@CINGULARGPRS.COM or ISP@CINGULARGPRS.COM
Password: CINGULAR1
Carrier:Cingular (USA)
APN:blackberry.net
User name:
Password:
Carrier:Cingular Blue/formerAT&T (USA)
APN:proxy
User name:
Password:
Carrier:Cingular Orange/MediaWorks (USA)
APN:wap.cingular
User name:WAP@CINGULARGPRS.COM or blank
Password: CINGULAR1
Carrier:Dobson/Cellular One (USA)
APN:cellular1wap
User name:
Password:
Carrier:Nextel/Telus/Rogers Sprint CDMA (USA)
APN:internet.com
User name:
Password:
Carrier:T-Mobile Internet (USA)
APN:internet2.voicestream.com
User name:
Password:
Carrier:T-Mobile VPN (USA)
APN:internet3.voicestream.com
User name:
Password:
Carrier:T-Mobile/T-Zone (USA)
APN:wap.voicestream.com
User name:blank or your T-Mobileuser name
Password: blankor your T-Mobile password
Carrier:SunCom (USA)
APN:internet
User name:
Password: