[General Questions and Answers] Planterz:
The info I found here is completely baffling to me. Half the phones listed say they're a 4G device and will work with voice/text/data/ The other half say they won't work because they're 4G phones. So as for the "why" you might be able to flash a particular phone, I don't know. Seems dependent on a phone-by-phone basis.

Does Page Plus even offer LTE service? Does it even offer 4G of any sort (like HSPA+)? The coverage map on their website only lists EV-DO for data. Plans list amounts of data, but make no mention of 4G or LTE.

Or are you merely trying to get LTE capable Verizon phones to work with Page Plus service, regardless of what actual speed of data they can get?

There's many aspects of this that I don't understand. Are you the operator of a corporate-owned store? Are you a franchise? Do you operate as an authorized representative of Page Plus, as well as other MVNOs? I really don't know how these type of shops work, although I see them everywhere.

Offering to flash for free might be breaking some sort of contract or something. I agree that it's greedy to charge so much for so quick/simple a task, but I'm not surprised they charge so much either, since bringing a phone and paying the money to flash it is way cheaper than buying a new phone (and the phone selection on their website is craptacular - just plain awful), so they get the money where they can.

The software to flash phones in this way, I'm betting, took a lot of development, time, and money. The fact that this service isn't available to you, and must be done through a separate, paid service, means to me that they're keeping this to themselves for reasons that should be obvious.

XDA is a community devoted to developing and "hacking" (primarily) the Android system. What you're looking for has far less to do with Android. and more to do with the carriers themselves. Some phones can be flashed, some can't. Or rather, ones that "can't" perhaps can, but would require a bunch of R&D to get done, and isn't worth it to find out. What I mean to say is that what you're asking for probably won't be done. Not without forking over a ton of money, because what you'd expect/hope to do is impossible, and the people who could do it have already done so, and they are the very people who offer this service at $55 a pop because it took a lot of time and money to figure out how to do it.

And no personal offense intended, but Page Plus looks like a horrible choice to go with for anyone who expects to use a smartphone. The phone selection sucks beyond comprehension. Seriously, the only thing it has going for it besides its cheap rates is that it has Verizon's coverage. But who needs that kind of coverage? Probably people that can afford Verizon's actual plans and can enjoy its LTE network and/or travel across the country a lot, and wouldn't bother with this joke of a company in the first place. Bring your own 4G phone? Why? Go with a Verzion pre-paid plan. Or tell Big Red to stick it and go with a company that doesn't anally rape their customers, like T-Mobile. It just seems to me that there's better options, including Verizon-powered MVNOs than Page Plus. When it comes to smartphones, anyway. Basic voice/text plans are probably OK.

Whatever. I don't know why I spent so much time responding to your post. I sincerely wish you success in your business. The world certainly needs people like you that want to give their customers what they need for as little money as possible, and with as little nickel-and-diming (ass-raping) as necessary. But the software/hardware/firmware limitations on so many phones made for the US market make what you're hoping for a physical and/or logistical/financial impossibility (or, simply, more than it's worth) to realize.