Originally Posted by The Tallest
Exactly, you can't use the online service to activate the phones because it's going to put you in a new plan. You must call them.
On Verizon, I switched from my 3G-only Fascinate to the Moto X (off-contract) using just the web interface. Yes, it asks you to "re-do" your plan, but the rep I was talking to said that's just how the system works - something along the lines of that's how you get the 4G activated. I still have my unlimited data (I can easily verify that, it's all over their website) and interestingly the price for the data actually went down from $30 to like $23 or something (perhaps because I'm not subsidizing the phone anymore?). So at least on Verizon you can activate over just the web - just chat with a rep while you're doing it. Verizon is NOT trying to trick people into switching plans (at least in this instance).