It's not possible to hear voice-messages via handset. Either your ear explodes or you touch other app-functions with your ear while holding the smartphone. Or you hold it in your hand and everybody around you can hear it loud. Feels like 2017. In addition you don't have control about your private settings. Every person who saved your number receives a message that you are with signal now. It doesn't matter if you allow the app access to your adress book. 🤷🏼‍♂️ I hate in-app rating requests