Hmm

  • Refurbished Refurbisher@lemmy.sdf.org
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    1 year ago

    Matrix would be fantastic. Phone number accounts hosted on the carrier’s instance, and can federate with other instances.

    Something like (for an American phone number): @0014204206969:matrix.att.com and have each carrier share which phone numbers are assigned to which carrier in some common protocol so all you would need is a phone number.