Verizon's own store can't let me transfer upgrade unless I switch from unlimited to 2gb data plan

You won't find any examples after 8/25/14 because if you transfer a UDP line's upgrade now and upgrade on a basic line, the basic line's contract won't be extended nor will the basic line be subject to the $30/mo 2yr data plan commitment. As has always been the case, the UDP line will have it's contract extended and now in addition, it will have the $30/mo 2yr data plan commitment so you WILL be kicked off of your $29.99/mo UDP if you do a transfer now.

Call Verizon to confirm. Best Buy confirms this, too. Or take one for the team and try it yourself and let us know what happens.

Calling reps for confirmation is never a good basis for anything. As we all have read and from experience, including any rep during any upgrade process usually ends up with your UDP removed or "lies" regarding that you'll lose your UDP in some way or another. Now not all reps were out to get your UDP prior to 8/25 but majority of them would tell you otherwise, which is one of the reasons why people do not involve any reps.
 
While I agree with you for the in-store reps, chat and the first line customer service phone reps, tier 2 tech support has always told me I would keep my UDP if I transferred my upgrade to a non-UDP line. Now tier 2 tech support says no go.

Same with Best Buy - IME the sales reps at BB have always known the transfer would maintain the UDP. Now they say no go.

You can read the rest of my thoughts here if you care to.

That seems to be correct. I have spent 2 hours on the phone with two Verizon supervisors and got no answer. They told me they would research into this and get back to me. They called me this morning and confirmed that the new 8/24 changes basically ended any possibility of upgrade transfer from UDP lines. Well... you can still do it, but you will 100% lose unlimited data.

What's even more "disturbing" was that the supervisor said that Verizon was aware of "some customers" taking advantage of Best Buy and a few other retailers by not activating their new phones in order to upgrade with UDP lines. She said Verizon was working on a solution to prevent this as well. :( I didn't even bring up Best Buy at all, so I guess many higher-ups at Verizon have been made aware of the situation with Best Buy. I sure hope they don't do it before the Galaxy Note 4 is available. :)
 
Flip an iPhone 6.

that's one thing I don't understand about Samsung... they announce new phones, but consumers can't get their hands on the new phones until several weeks after the release. on the other hand, Apple usually makes news phones available immediately.
 
Of course they are, so as I said, use your upgrades quickly. You know they are reading these threads. I make sure not to post here from my phone, btw, lol!

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I wonder how hard is it for Best Buy to update their order system to prevent people from pulling the Best Buy trick. I'm no computer programmer, but I assume it takes less than 24 hours? :)