I recently switched from T-mobl to Boost mobile . How can I reconfigure my Pantech C810 to operate on Boost?

I just switched from t-mobl to boost mobl . The boost phone sux . But when I put the boost sim card in my unlocked Pantech C810 It can not access the Boost Mobl network . How can I reconfigure my Pantech to operate on Boost's network ? When I first began using it on T-mobile their tech support was able to guide me thru reconfiguring the server access codes to enable all the features . The pre-paid services ( Boost , Straight talk , etc. ) however don't even seem to have an athletic supporter , let alone tech support !