You and everyone else who purchases an unlocked or even a networked locked device outright from the manufacture needs to sue any carrier that prevents wifi calling. The carriers purchase the rights to use a specific microwave frequency from the FCC. The carriers did not manufacture the phones we purchased nor did they pay the government for the exclusive rights to use any wifi frequency. Making a wifi phone call uses hardware make by a 3rd party manufacturer and purchased by the end user and uses a frequency that has nothing to do with a carrier.
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