HTC TyTn II displays "No Service" message;Contacts/Calendar gone

After low battery closed the phone down last night, this morning my HTC TyTn II displays "No Service" message; also the Contacts and Calendar are not accessible (Favorite Contacts also gone). Will not allow Active Sync anymore and cannot even access phone touch pad to dial out. However, Internet Explorer still works as does the Send/Receive function on email accounts. Anybody know how I can recover the Contact/Calendar features as well as the ability to make calls? Vodafone said may need to do Hard Reset but I don't want to give up on recovering data.