I have a iPhone 4s but this problem seems to happen no matter what the phone as I tried it on a 5c. the problem is it doesn't ring when the phone is asleep for a few minutes and if it does it is after the caller is already getting the voicemail greeting. I have the ring length set to 30 seconds and I have tested it with the tech support and they sent me to this forum.
"this is regarding Mobile app issue and I'm reaching out to you to inform you that we have checked this issue with our products team and found its a product limitation and no work around is available to it. "
Anybody have this issue? Solution? It only seems to be with this one extension. I have created a new extension (it is a "virtual extension" meaning no direct number) and it gives me the same problem. It rings right away with the desktop app. The tech had me change the notifications on the iphone to alert instead of banner and deleted and reinstalled the app. logged into another extension and gave the same problem.
Have not reset the phone which would be a real hassle.