[LG V30 Questions & Answers] TheDannemand:
A few things I would add about Red Pocket:

1) They are not ALLOWED to name the carriers whose networks they use. I presume because the carriers consider their brands so precious, they don't want MVNOs to use them in their marketing (as in "we provide service on the Verizon network").

2) While they are indeed pretty great on AT&T (GSMA) I think their T-Mobile service (GSMT) is an even better choice for US998 users as the phone fully and easily supports VoLTE and VoWiFi (WiFi Calling) on the TMO network, with proper Network settings menus and all. On GSMA (and I presume other networks too) you have to rely on the hidden menu to configure it. Unfortunately T-Mobile has become more protective of their service and is currently not available on all Red Pocket plans.

3) I can confirm what ChazzMatt posted that you need a Verizon IMEI to activate Verizon service on Red Pocket (CDMA). I tried a few months ago to switch my plan from GSMA to CDMA using my US998 (converted from LS998) but the system refused based on the IMEI. The agent quietly confirmed that I would need to activate on a VZW phone, then move the SIM over. I wish I had made that switch last year before before their policy changed, but back then I had H932, which doesn't support CDMA. While AT&T has decent reception in my home (better than TMO) it is not as good as it was two years ago. I would expect VZW to be better.

4) When I first got my US998 early this year, I checked its IMEI on their website, and it was compatible with GSMA (AT&T), GSMT (TMO) and CDMAS (Sprint). The Device Compatibility Check is no longer on their website, so I cannot confirm it now.

5) You can switch between the different carriers available on your plan, as long as your phone supports it. You do this through their Customer Service Chat, preferably on the last day of the plan month, since you lose the remaining days of that month. You need an unused SIM card for the carrier you want to switch to. If you don't have one from a starter kit, you'll have to order it from their website ($5 free shipping). Note that old SIM cards can NOT be re-used, so if you need to switch back, make sure you have an unused SIM card.

6) VoLTE is officially provided on all networks. See this. VoWiFi (WiFi Calling) is officially provided on GSMA (AT&T), GSMT (TMO) and CDMAS (Sprint), but NOT CDMA (Verizon). See this. Of course it has to be supported by the phone on the chosen network, but Red Pocket does NOT restrict access to these features. You simply ask them to enable them on your account. GSMA (AT&T) VoLTE works on my US998, but NOT on my wife's H932 (at least not easily). I have not been able to make VoWiFi work on US998 ROM, but it DOES work when flashing H931 ROM on the same phone. Others have confirmed that both VoLTE and VoWiFi work with US998 on TMO. I would definitely try a switch to CDMA (Red Pocket Verizon) with my US998 if I had a VZW IMEI on which to activate. It might work right out of the box (again, since Red Pocket DOES provide it). Otherwise I have enough experience now messing with IMS settings that I think I might be able to make it work.

7) Tethering with US998 works on GSMA by adding "dun" to the APN type. Others have confirmed that it works on genuine Verizon, and we can assume it will work on CDMA, CDMAS and GSMT as well.

8) One benefit I haven't mentioned in previous posts is that international calling is not only supported but FREE on all their plans: As long as you have minutes, you can call most of the world on those minutes at no extra cost. OTOH, sending international SMS has always been unreliable, for some reason.

9) Starting earlier this year Red Pocket began pushing iPhone sales, and downplaying BYOD, which I find annoying. I wonder if the carriers are squeezing them and they're looking for alternate revenue sources.

Alright, there's my Red Pocket write-up. All I can think of :)