Yeah, they wanted to kill it off long before then and some did actually stick around into early 2023 to let companies upgrade/replace "critical" infrastructure but that was fairly spot-by-spot. It was "officially" offline but not actually offline in some places.
If you design a project with a cell modem in it.. You should probably make it modular so you can replace it with a newer piece of kit if you expect your hardware to be in use for a very long period of time.
I still have a few 2G devices here, looking for replacements on those. I was using some Zoom 4G modems, but those lasted about a year before getting unreliable.
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