Organizations like to identify you by phone number, because it is the easiest way to prevent duplicate identities (Most users have one and only one number to re

Organizations like to identify you by phone number, because it is the easiest way to prevent duplicate identities (Most users have one and only one number to receive SMS messages). Of course it also makes it easier to purchase and sell customer data. For this reason I'd guess that many companies use SMS-2FA as an excuse to collect and confirm your mobile number.