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Actually, "voice over WiFi" is a thing. Seems like it uses the SIM for auth, but transmits the voice data via IP (similar to VoLTE). I think tin foil in the wa
by archi42 7y ago
Actually, "voice over WiFi" is a thing. Seems like it uses the SIM for auth, but transmits the voice data via IP (similar to VoLTE).
I think tin foil in the walls could do the trick, but I'd be wary of potential moisture build up. I'd stay with "just buy stuff that doesn't phone home".