I use MaaS 360, works well for us.

Sounds fun, going to have to make this happen.

Does this help, from 2017.
https://mangolassi.it/topic/13143/upgrading-the-freepbx-firmware

That looks so enticing!

Vultr Instance and ServerPilot
serverpilot.io ( or my Referral Link: https://serverpilot.io/a/929b0a32da42)

"Includes everything you need for fast, secure hosting.
Free SSL certificates
App isolation
Firewall configuration
Server security updates
Database management
Multiple PHP versions
One-click WordPress installer
HTTP/2 support
Brotli support
API access"

Cradlepoints are top of the line in my opinion. I have used several of them in the past and all work excellent. Might be worth a shot to reach out to your preferred cellular carrier and see what options they have.

Terminus FTW!

Larger monitors don't help, I use a 27 inch and when I take my laptop off the dock all hell breaks loose on my desktop.

Browser tabs...Fresh reboot, Chrome asking me if I want to re-open my window with 36 tabs. I guess we all have issues

I thought Pertino went End of Life unless you migrated to their NetCloud platform a month or so back? Note, they did have an outage yesterday that could have caused your issues... https://status.cradlepoint.com/