Okay, so here's what I did, and now I'm not getting my carrier to show up.
I restored my iPhone 5, jailbroke it, went to Cydia, downloaded iFile and installed the CommCenter patch for iOS 7, edited the folder /System/Library/Carrier Bundles/iPhone/310200 and redirected the link to TMobile_US.bundle, restarted the iPhone. Calling and Text works, USSD works, Voicemail doesn't even after restarting also, the iPhone states that there is "No Service" however and there's no Data now.
Help?