Best ways to ensure redundancy with no terrestrial ISPs

[ross at tajvar.io (Ross Tajvar)]

Hi all,

A friend of mine is trying to set up a network in a location where there is
no fiber (or copper) for many miles. As bandwidth requirements are low (<1M
for the foreseeable future) but uptime is important, he was looking at
using multiple cell modems from separate carriers as redundant uplinks. I
am concerned that different cell carriers might be using the same transport
providers to a given tower, so that wouldn't be truly redundant. Another
option would be using a satellite provider as a backup for cellular. (The
high latency that comes with satellite is not an issue.)

A fixed-radio solution would likely be too expensive upfront as it would
require building towers.

Am I missing any other options or considerations?

Thanks,
Ross
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