Some of these ideas are really becoming a rabbit-hole for me. I like the idea of forwarding SMS to email, but then you need an email provider who will never pro

Some of these ideas are really becoming a rabbit-hole for me. I like the idea of forwarding SMS to email, but then you need an email provider who will never prompt for some sort of 2fA just because you're outside the country or on an unfamiliar device, and an always-on mobile device. The email provider who will never ask for 2FA to get in might be harder than it sounds. I've heard a story which I believed at the time, of Gmail not letting someone in without approving on an old device, even with the password and correct TOTP. Something odd like SDF could work here. I suppose the always-on device should have no battery. I once had an HTC smartphone that would power on with the battery remove, but would sometimes crash. I think people who run postmarketOS do something to not require the battery, but soldering seems to usually be involved. USB 4G modem, old laptop with built-in 4G? Edit: Just adding that I'm a big fan of SDF.org, so would love if that turns out to be the least messy solution!