Yes, you can create multiple accounts and get all text/call notifications in one app. I recommend you use the Cheogram app for phone or Dino-IM for PC.
I meant Verizon for service on my phone and then have JMP.chat number for making calls/text. I don't use the phone number that's given from Verizon, I use the JMP.chat number instead. <---- This is my setup for my phone, not my laptop. JMP.chat works just fine over WiFi. Sorry for the misunderstanding.
For getting service on my laptop though, I use a USB modem that's connected to my LibreCMC router. I travel around with the router/modem in my backpack. The LibreCMC router doesn't need an outlet, it can be turned on by connecting it via USB to my laptop.
Unfortunately, the flip phone route for doing daily calls/texts won't work because I use multiple phone numbers, and those phones have proprietary operating systems/firmware. Though, I still keep one in a Faraday bag if needed for emergencies.
Oh, I already use GrapheneOS on my Pixel; it's a nice experience, but at the same time, it's not enough for me. The firmware isn't free, and I don't like the fact that it can still spy on me to some extent. I also just don't want to use my phone; I find myself to be a lot more productive with a laptop.
It is convient, but I'm trying to avoid using proprietary software as much as possible. Those phones tend to use proprietary operating systems. Thanks for the suggestion though!
I signed into my JMP.chat account via XMPP on Pidgin. I can make calls and texts just fine.
Edit: Pidgin (installed from Trisquel repos) can be used for texting, but as of right now, calling seems to be bugged. I'm currently using Dino (installed from Trisquel repos), both calling/texting work fine on there.
Well, you should've debated better instead of just straight up saying "you need to get rid of people like me" and comparing me to a guard at a concentration camp. I wouldn't have called you a nutjob then.
True, It's not a deal breaker if they're not into computers. It's more of a preference that I seek to fulfill.