If an external number is busy, the wrong announcement is played.
There is no busy signal here, but the announcement sounds. "Unfortunately, I couldn't find the person called"
This is confusing because you don't know if you dialed the wrong number or if there is another problem. I tested this with 2 providers (sipgate, voip2gsm), both times the same.
Ahhhh I just tried something.
If I have the system language in English ... everything is perfect.
If the external number called is busy, beep beep beep ... supa
If I use the system language in German, the incorrect announcement sounds.