Ok so let me see if I get this right...upgrade some time this December (hopefully) keep unlimited. But for future phones, buy them outright? What if your upgrade is in May and you go from 3G to 4G...buy that outright or is the switch in networks not considered a change to your contract?
Verizon Confirms 3G Unlimited Data to 4G Upgrades Keep Unlimited Data | PhoneNews.com
FWIW