[sand1303]

i recently picked up a sprint mogul and it was working fine when i got it. later the same day it started locking up on me reall bad. it would not even boot up all the way without four or five resets. so of course i did a hard reset or two. it would boot up fine after the hard reset then sure enough would start freezing again. so i downloaded the rom from htc website and reloaded it. still freezing like crazy. i activated it and i had to go back to my old phone because the problem is too bad. is there anything i can do about it? i do not have insurance but if i activate it back can i get insurance added to it even though it is a used phone and i did not buy it from sprint? any programming i can do to stop the freezing?