Signal’s third reason is that it does not want users to be confused between SMS and Signal messages in the app. It stated that distinguishing these has “serious UX and design implications.” Furthermore, Signal stated that discontinuing SMS support will free up resources for other projects and features.
Following a data breach at its verification partner Twillio, it made the decision. According to Signal, the incident exposed approximately 1,900 of its user’s phone numbers and SMS codes. It’s unclear whether the request to discontinue SMS support is directly related to the breach.
