iPhone 4 T-Mobile USA MMS/EDGE Settings

Add this to your Settings>General>Network>Cellular Data Network
MMS
APN: epc.tmobile.com
Username:
Password:
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS Proxy: 216.155.165.50:8080
MMS Max Message Size: 1048576
MMS UA Prof URL: http://www.apple.com/mms/uaprof.rdf

After entering these settings, I Sent and Received an MMS. I then restarted the iPhone 4.

After restarting, once again go to Settings>General>Network>Cellular Data Network
Internet
APN: internet2.voicestream.com

T-Mobile ISDN settings

T-Mobile ISDN settings for terminals (e.g., phone handsets). This is an ISDN dial-up number for WAP use only. Some items are possibly Nokia-specific. I have found the authentication type can be either Secure or Normal.

     Dial-up number: +1 913 244 0821
     Data call type: ISDN
    Data call speed: 14400
         IP address: 10.168.200.50
        Data bearer: GSM data
           Username: wap
           Password: [none]
Authentication type: Secure
Connection security: Off

T-Mobile GPRS or EDGE modem settings

T-Mobile GPRS/EDGE settings for terminals (e.g., phone handsets). Some items are possibly Nokia-specific. I have found the authentication type can be either Secure or Normal. These settings should be useful for T-MobileWeb users.

                APN: wap.voicestream.com
         IP address: 216.155.165.050
        Data bearer: GPRS
           Username: [none]
           Password: [none]
Authentication type: Secure
Connection security: Off

APN is the GPRS Access Point Name.