Yes MetroPCS is a smaller carrier. It's really big down in Tampa, FL. I had em when I lived down there. There is no cab that will do all the settings for you but there are some step by step instructions that you can follow, 1 is here on ppcgeeks,
http://forum.ppcgeeks.com/showthread.php?p=1189036 and then there are a couple threads on the Howardforums.com that can also help you out. Here's two to get you started.
http://www.howardforums.com/forumdisplay.php?f=476 and heres another one
http://www.howardforums.com/showthread.php?t=1466303 sorry it's not a cab, but it's pretty easy step by step instructions. Hope it helps ya out.