It depends I think on this, I have been a VZW "Unlimited BroadBand Access" Customer for many years now. My account is Grandfathered as True Unlimited Access, as that was the plan I signed my contract on. I have upgraded my device a few times over the years and have not lost that status on my BroadBand Account. My Bill even States, "Unlimited Access". Most of the new plans are listed as 5gig Max accounts. I have even heard of the Unlimited account being transferable too. But once deactivated, The Grandfather status disappears.
We can only hope that since they sold us all "Unlimited Access" on our smartphones, that these also get GrandFather Status too. Only time will tell.
I can tell you this, that VZW can throttle back your connection anytime they want to. They are suppose to have this option in their system. So you only access their network at slower speeds / less data use. I have not had this happen to me yet, but have heard it happening to others. I very seldom cross the 5 gig line though. I come close often. I only use this CDPD Modem (3G, REV-A) while on the road for work. Very seldom at home.
All true, Jim. I'm in a similar position with a "broadband access" plan tied to a netbook I use on the road and I've been able to change devices while retaining my original data plan for that (new) netbook when I bought it.
But I did notice when I got my Droid that it was specifically characterized as "compatible with my current plan." (This was my phone plan, not my broadband access plan.) That allowed me to retain the features of my family phone plan for the droid. (I already had "unlimited data" on my WinMo phone.)
At that time I noticed that some other smartphones were not "compatible with my current plan." Had I chosen one of those phones, I would have had to change plans. I suspect that may be the means by which VZW will force users to shift to a tiered data plan. New phones won't be "compatible" with current unlimited data plans.
As another poster noted, VZW may find it worthwhile (from a competitive standpoint) to enable multiple users on the same plan to "share" data plans, just as they now "share" cell phone minutes. Time will tell. If Sprint sticks with "unlimited data" to gain customers, VZW may find such a sharing arrangement could prevent defections.
Finally, I suspect that this whole issue is in flux, both from competitive pressures and technological changes. For example, I don't come close to using 5 gigs a month on my Droid, primarily because about 90% of the time its data use is through my home wifi network which doesn't count, at all.
As more wide-area high speed networks are installed, I would not be surprised to see differential pricing for 4G and 3G use, just as there is currently a difference between using the VZW 3G network versus wifi.