The running theory is that if we buy the TB now, we will be locked into 4G forever. The problem though is that VZW customer service and store folks state that the grandfathering is only good through your contract. If a change happens during your contract, you are covered. Any changes to pricing or service can be forced after a contract ends, or you buy a new phone that is discounted (and resets the contract). I know with Tmo, the pricing stayed the same, even after you renewed, so the granfathering was from point of starting as customer. Not sure how this stuff will play out with VZW, but seems if the wanted to kick folks out of unlimited, they can at end of contract. At&t may change Tmo's tune on contract now, but anybody have insight on how Verizon may approach once tiered kicks in?