Verify and update APN ( access point name ) settings for T-mobile ( Android )

1. From the Home screen, press the Menu key.
2. Touch Settings.
3. Touch Wireless & networks. Depends on software version
4. Touch Mobile Networks.
5. Touch Access Point Names or APNs.
6. If there is a T-Mobile APN, touch it. If not, press the Menu key, and touch New APN.
7. Verify and update the following settings for the Data APN:  
   • Name: T-Mobile
   • APN: epc.tmobile.com
   • Proxy: <Not set>
   • Port: <Not set>
   • Username: <Not set>
   • Password: <Not set>
   • Server: <Not set>
   • MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy: <Not set>
   • MMS port: <Not set>
   • MMS protocol: WAP 2.0
   • MCC: 310
   • MNC: 260
   • Authentication type: <Not set>
   • APN type: <Not Set> OR Internet+MMS (depending on software version)
8. Press the Menu key.
9. Touch Save.