With this update, it seems that the voicemail tone plays every so often, even when there haven’t been any mailbox status changes.
Can you elaborate more what do you mean by voicemail tone plays every so often?
Our current firmware will play the voicemail tone once when there is a new voicemail received and also it will only play once after reboot IF there is still unread voicemail.
Right, so seems to suggest the phone may be deregistering and reregistering (causing it to re-chime with a new VM).
If that’s the case, do you mind to send us the capture trace so we can look through it?
We couldn’t reproduced your issue in our end.