Matt,
I didn't see that anyone suggested anything to get your phone back into operation, but I believe the same thing happened to me. To get mine working again, I dialed up ##786# then selected "Reset Default". Enter the security number and proceed. This will bring the phone back to it's factory settings, but you'll probably have to reactivate the phone too. Unfortunately, you'll lose all contact info, etc.
Good luck,
dmb
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