Android Phones - various models

Internet
1.Press the menu.
2.Tap Settings.
3.Tap Wireless Controls or Wireless & Networks..
4.Tap Mobile Networks.
5.Check that:
"Data Roaming" and "Use Only 2G Networks" are both unchecked.
Tap Access Point Names.
Press the menu button.
Select New APN.

→  Name: good2GO
→ APN: att.mvno
→  proxy:  proxy.mvno.att.ztarmobile.com
→  Port: 80
→  Username: [empty]
→  Password: [empty]
→  Server: [empty]
→  MMSC:   http://mmsc.cingular.com
→  MMSProxy:    proxy.mvno.att.ztarmobile.com
→  MMS Port: [empty]
→  MCC: 310
→  MNC: 410
→  APN Type: [Not set]
    *For Samsung Behold II press #*87927#