TMO being a hive of hackers and me enjoying far out scenarios in fiction; I though I would post some alternative data channels if some sort of virus related emergency leaves you without Internet(vs unimportant stuff like food, shelter, medical, and civil society protections)
Othernet, requires specialized receiver but cheap to buy(North America spot and Europe spot)
https://en.wikipedia.org/wiki/Outernet
Toosheh, mostly a bridge for Middle East and Iran to bypass censorship, uses DVB-s2 receivers with PVR, a USB flash drive and a decoder app
https://en.wikipedia.org/wiki/Toosheh
This is all I could find, but I recall there being other narrow band and full channel satellite data stream services for offline communities, I must be using the wrong search criteria.
For terrestrial there is Disaster Radio, think amateur radio packet service but run over unlicensed LoRa hardware.
https://disaster.radio/
More rx only projects are possible with a central transmitter broadcasting general interest BBS like data and received with DVB-T dongles with a hacked debug mode driver aka RTL-SDR or other demodulators.
If we are down to sneakernet(carrying data around, imagine the data bandwidth of a station-wagon blasting down a highway loaded with data tapes or flash drives, ping time sucks though) then something like Briar which can spread a message or forum post without Internet by virally spreading it's data via bluetooth and wifi meshing.
https://briarproject.org/how-it-works/
I am curious if anyone else has more zombie apocalypse data chanels bot rx and tx.