Until now I was using Signal to manage my SMS/MMS but they recently announced that they will stop support this, so I just switched back to the default app.
I'm using dual SIM so when sending a SMS I was expecting the app to prompt me which SIM I want to use (like the phone app does) but no, it just says that no preferred SIM is defined and doesn't send. So I must globally define a preferred SIM so the app use it, but this solution is not satisfying because the SIM I want to use depends on who I'm writing to, it can't be globally set.
Is this a bug, or
a feature this app just can't manage dual SIM ?