unfortunately the contract end date is a few months away. since the phone has been lost and not used paying the monthly service is cheaper than an etf. so you call up in a few months and say cancel the service on phone line three. No I don't want an upgrade just remove it from my account and cancel it. Doesn't that feel good now ?
Personally I would go to a Verizon Company Store at that date as to get a receipt from them as it was cancelled and no further monies are owed on that line.