Like I previously stated, the Treo Pro (WinCE) phone is the easiest phone I've ever used. Put it in DIAG, Connect to PC, Use CDMAWS and send HTC SPC Method, Read EVDO values, save them, then on the phone you can read the Profile 1 Username/AAA and that's all you need.

Write the data values to your MiFi and save. It literally takes 10 minutes (or less) to do a Sprint MiFi on Boost. If you want to use a Verizon MiFi, it takes a few extra steps.