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Time to get serious with E2E encrypted messaging
(techcrunch.com)
This is a most excellent place for technology news and articles.
You can choose to share a username instead of a phone number, but they still require the phone number at setup iirc.
True.
Then your point…?
Only that you need the phone to setup the account. i.e. it doesn't have to be the phone you use- it can be a hotel phone or whatever.
It used to have to be the phone you used for messaging.