Users will “no longer be able to use Messenger to send and receive SMS messages sent by your cellular network when you update your app after September 28, 2023,” according to Meta. This feature has been supported since 2016, making it nearly 7 years old at this point. It was first introduced in 2012, then removed in 2013, and then reinstated in 2016. Users are being redirected to their phone’s default SMS app.