I believe the newest build is IMM76D.I535VRALG7 and that only went out recently.
You could always try a factory reset if you still have issues. That's pretty much what they'll do at the VZW store if they can't work around the problem and grab the update.
Or it could be the SIM card. Try re-seating it. If that doesn't work, call VZW and have them confirm it's setup in the system correctly.