https://thenextweb.com/security/2019/09/05/twitter-suspends-sms-feature-after-ceo-dorseys-account-was-hi-jack-ed/

Twitter has temporarily suspended the ability to tweet via SMS following high-profile hack of its CEO Jack Dorsey and a number of celebrities.

“We’re taking this step because of vulnerabilities that need to be addressed by mobile carriers and our reliance on having a linked phone number for two-factor authentication,” the company said.