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From what I know, this wouldn't work. I worked for a telco and the way they explained it to me is that SIMs for these purposes are not the same as consumer SIMs. They end up on a different network using a different APN and they typically go straight to a VPN or other private network for their owner. And no, you can't reconfigure them to the consumer APN (I asked). (This was not in the US btw.)

Most SIMs for such purposes are sat directly on an L2TP connection or similar. They’re often not public internet.

As a consumer you can buy similar - I know my ISP (A&A) will sell you (quite reasonably) a sim that will drop straight onto an L2TP connection of your choosing.

Nope.. Machine to machine plans most likely