WhatsApp is testing an 'answerphone' for missed calls
WhatsApp would like you to leave a message after the beep. In what feels like a blast from the past, Meta is testing what equates to an answerphone service in WhatsApp.
Currently undergoing beta testing with a limited number of users, the feature seeks to encourage conversation and connectivity. You have almost certainly been notified of a missed WhatsApp call on your phone, but how many times has the person who called followed up with a text message? Probably not often, and this is something WhatsApps is looking to address.