Google Nexus One, G1 & G2

Internet Settings:
Press the menu button (on front of phone).
Tap Settings.
Tap Wireless Controls.
Tap Mobile Networks.
Enter the following details:
→ APN: att.mvno
→ Proxy: 66.209.11.33
→ Port: 80
→ Username: Leave blank
→ Password: Leave blank
→ Server: Leave blank
→ MMSC: http://mmsc.cingular.com
→ MMS Proxy: 66.209.11.33
→ MMS port: 80
→ MCC: Leave blank
→ MNC: Leave blank
→ Authentication type: Leave blank
→ APN Type: Leave blank