From the New York Times, via @puiwingtam and @nullpointr on twitter:
Your cellphone number is now "an even stronger identifier than your full name." There might be a lot of Brian Chens, but only one @bxchen with his specific 10-digit number. https://t.co/5IXAp7w47z
— Pui-Wing Tam (@puiwingtam) August 15, 2019