homescreen.
Tap on the “Manage” Tab and then tap on “Sources” section.

http://cydia.pushfix.info

After it is successfully installed, tap on the “Search” tab at the bottom and search for ‘T-Mobile US MMS Fix for iOS4’.
.
Then tap on the “Install” button and then the “Confirm” button to install the patch.
, you should see the following settings under MMS:
APN: wap.voicestream.com
MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
MMS Proxy: 216.155.165.50:8080
MMS UA Prof URL: http://www.apple .com/mms/uaprof.rdf
Restart your iPhone .
After your iPhone has restarted, MMS should be working on your jailbroken and unlocked iPhone on T-Mobile US.
As always, let us know it goes.