I got some cheat codes for all the TMO phones out there.
#646# <send> minute useage sent to your handset as text [MINutes]
#674# <send> Text usage [MSG]
#686# <send> your mobile number sent to your handset as text [NUMber]
*686 <send> reads back your number to you [NUMber]
#225# <send> your current balance sent to your handset as text [BALlance]
#796# <send> toggles whether you need password or not for voicemail [PWO]
#793# <send> resets voicemail password to the last four digit of your phone number
#999# <send> prepaid balance
46645 Google lookup service
http://www.google.com/sms/howtouse.html