Went through a lot of crap to get my phone number changed today...though the sprint people at the store were extremely helpful with my rooted gingerbread rom cause they all have done it on their evo lol. one lady was impressed on how responsive our phone was with 2.3.5 compared to stock. anyways long story short. if you have Google voice activated on your phone and you want to change the phone number, as the sprint representative to deactivate your Google voice , they can do it in store, then change the phone number, be sure to have at least reborn rom on temporarily so they can do a prl update and profile update. check to make sure the phone makes and takes calls. then when you get home put whatever rom you had back on and go to your Google voice inbox and activate your new phone number.