[ev1]

I don't know how well this generalises, but in my sample size most people including myself don't even know our own phone number if asked. You don't exchange phone numbers. You might hold out your phone for the other person to scan your Snapchat QR or tell them @hn2022 and a platform like instagram. If you say hn#2022 people know automatically which platform that is. A sizable amount don't even have phone numbers and opt for data plan only for cost savings if paying for their own plan.