aggravated

i need a new phone because my stupid blackberry which i have had since april 08 has decided to allow two buttons to fall off, shut off, freeze up, and officially aggravated me. here's my dilemma, cell south won't let up upgrade until april '09 and i really really want the htc touch diamond. however it would cost me 500 dollars to upgrade now and i'm sorry but no phone is worth half a grand, i don't care how cool it is!!!! i really don't want to switch cell phone carriers because that'll cost me even more. what's a guy to do?????????????