I don't think that it will be necessary to connect a wallet for your bitcoin with a phone number.
From a technical point of view I think that is even impossible.
What I can imagine, and what is already in place at many exchanges, is that you have to ID yourself when you want to exchange bitcoin into fiat.
And that includes a phone number.
Well maybe your phone numbers maybe added to the walkers public Key or something like that else I likewise don't see the practicability of attaching phone numbers to our bitcoins.