Rather than taking the thread in a negative direction...

1. VOIPo isn't perfect, but Tim is working on it.
2. Tim did mention possibly getting a 'deal' on some HT502's from a different company that was going under and had excess inventory. However, I do not believe that was the reason for switching to the 502, it was a means of getting extra inventory at a low cost.
3. Family share plans--offered by both Verizon and AT&T--if you have a "family share plan" the primary line's cost is in line with an individual plan (maybe a variation in cost or # mins included), and add-on lines are $9.99/mo each. The included minutes are shared between both the primary and add-on lines... Obviously, this is not much of an option if the primary line is provided by an employer or if the primary line is a prepaid cell. The point here, though, is that it's probably worth getting a prepaid cell or an add-on line (if your primary line can be converted to a 'family plan') at this time.

Let's please all keep in mind that this forum is intended for community-based customer support. It's great to be enthusiastic about the product being offered here and the service that's provided. But we do have to acknowledge the bumps in the road and understand that not everyone will have the same level of service.

As for equipment, outages, fault, etc. Yes it's true the Phonepower uses the HT502. Unless a PP user or rep posts the info, you don't know what firmware version they're running, each ISP adds variables to the situation, etc. My point is that there may well be issues on voipo's end, your ISP's end, Grandstream's end, etc. At some level, you have to accept the situation for what it is and decide on the best path forward. A few suggestions were made by others in posts above--let me recap and add one or two of my own:
1. Get your wife a cell phone (prepaid, add-on to family share plan if possible, or primary line). I realize your wife doesn't need one per your post above, but it is something to consider.
2. Exchange out your HT502 for a PAP2T. Yes, if you do so you'll have to purchase a router which is, understandably, not your preferred route.
3. Consider obtaining a different ATA on your own, and configure it yourself. For example, you could get a SPA-2102 from ebay (buyer beware). Granted, if you're going to spend that money, you'd probably be better off getting a router and a PAP2T from voipo.
4. Get a bare-bones POTS line so you can call in to your wife if there is a service interruption.

I realize that all of these options require time and/or money on your part and that they wouldn't be necessary if voipo had everything working on the HT502 as it should. Here's to hoping that situation is resolved, or will be soon, or that voipo is able to send you a different router/ATA combo unit that will meet your needs. Obviously, in the event that all of the above does NOT work out, you're probably best off going with a different phone service provider at this time. Does that mean that voipo is a bad company? Of course not--it just means that they may not be the best choice for you at this time. There's certainly nothing wrong with that. Best of luck with a speedy, satisfactory resolution. If you have any other troubles that you think can be answered on the forum, please feel free to post.

[Sorry for the "mod-like" lecture--I'm not a mod and don't want to be (nor am I affiliated with VOIPo in any way other than being a customer, former Beta tester, and HG customer). I thought twice about posting it, given that I'm not a mod, but as you can see, I decided to put it out there anyway. ]