Thanks, everyone, for your replies. The consensus seems to be that yes, this is a 3g (NOT a 4g) phone and that Page Plus should (whether or not they actually WILL) honor it as such. All fine and good.
But ... what about the X2s on eBay being sold with/as 4G? FoxKat's link (post #8) has someone saying:
"A clandestine group of engineers have already mod'ed a Droid X and managed to cobble in a limited 4G capability. It required both hardware and system software mods that cannot be discussed here. ... I didn't do the mod and the folks who did do not want to be contacted or identified."
Somehow I doubt these people are converting enough of these phones that they show up on eBay:
Motorola Droid X2 MB870 Verizon Smartphone 723755000124 eBay
I contacted this seller, saying: "Interested in the phone, but thought the X2 wasn't 4g ... but the display shows 4g??? Why? Thanks"
He replied: "The x2 is 4G ..thank u for ur interest I'm trying to add the buy it now price my reserve price is 40 phone works perfectly"
Then the one (a different one) that I purchased (also from eBay) is supposedly 4g?
I'm going to contact Page Plus again about this tomorrow ... at this point I really want to get to the bottom of this.