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FWIW, Signal can send SMS to a regular number on Android.

https://support.signal.org/hc/en-us/articles/360007321171-Ca...

Thanks for the reminder. The idea was to use signal with a degoogled phone. It would be great if signal could send SMS without the cell network. There are places and devices, without cell connections.

It's the network itself that is limiting this, since SMS was designed for intra-network communication - so the sender needs some kind of network ID.

Something like Google Fi can provide a web-based client for your SMS (which works on any device and doesn't require cellular) because they know your virtual SIM and can emulate it as needed. But I don't see how Signal could pull that off.

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