Also, be advised that, even if your phone will not OTASP via *228--so long as you have the MDN/MIN, SID/NID, IMSI, etc. properly provisioned--you should still be able to send and receive voice and SMS text only for this phone. Just manually load the PRL of your choice.
As a reminder, WAP, MMS, and Brew will NOT work, as this is a non-PDA Sprint hanRABet.
Unfortunately, you will also not be able to get GPS to work. If you are serious about the GPS feature, consider an HTC Touch OR Mogul.
Cheers.