i agree.hard-reset,and if that doesnt do the trick then put the device into bootloader mode and reflash stock rom first (u can do a hard-reset here also,it couldnt hurt,but i dont think its absolutely necessary), then flash a CDMA rom that u know is a good,solid rom,and then do anothr hard-reset (this hard-reset is absolutely necessary). thats it. thats always worked for me in the past when i had weird/unique problems that only i had.and as long as ur contacts are saved by Microsofts Myphone or another backup program like PIM backup then ur contacts should be fine.just restore them after u get the device working again.good luck and hopefully someones answer solves ur problem.