Bring the phone into a Verizon company store. Tell them that the phone updated and now won't connect to the network. Will they please either fix or replace it? The phone is under replacement warranty, the update is their liability, so the responsibility to have you walking out of the store with a working phone is theirs. If they have to "send you one", you want credit for the time from when the phone stopped working until the time the new one is working - and compensation for any loss you suffer if you suffer any. (If the phone is a business phone, and you lose business because the phone isn't working due to their update, liability law says that they have to compensate you for that. If you miss a "free app of the day" that you wanted, they have to pay for it, if you want to get nit-picky. They should have enough S5s in stock to replace it while you wait. Make sure that EVERYTHING is backed up. Fix or replace, you're probably going to lose all your apps and data.)