I'm from China where WeChat dominates everything and SMS are nothing but to receive verification codes. Almost everyone here use WeChat as their contact and Con

I'm from China where WeChat dominates everything and SMS are nothing but to receive verification codes. Almost everyone here use WeChat as their contact and Contacts.app is merely opened no more than once a month. This phenomenon is common from giant cities, like Beijing and Shanghai, which are at least as developed as NYC or SF, to small cities in the rest part of the vast country, which are absolutely 3rd or even 4th world. I agree with your point that in some countries people don't use Email and that's the face in China as well. But people use phone numbers just for register other services, as the online identity. We don't use SMS, and we prefer WeChat Audio over phone calls when it's available.