If you read the terms of service (I did, this morning), Verizon reserves the right to change any terms of service (e.g. # talk minutes, data co$t, et al) at any time. You cannot currently upgrade your phone (at least to a 4G) online at VerizonWireless.com and keep your unlimited data plan - it forces you to chose one of the tiered plans. However, Amazon Wireless allows to upgrade your phone (to a 4G phone) and keep unlimited data - it's one of the choices when you choose a plan. Still doesn't matter, as they're allowed by the contract you sign to change whatever they want to change, whenever they want to change it.