We have determined this issue is resolved. If you are still experiencing issues with incoming calls on iOS, please contact support@level365.com

Push issue has been resolved. We are monitoring to make sure solution is permanent.

Engineering has identified what is believed to be the root cause of this issue and are working on implementing a solution.

We are currently investigating an issue with incoming calls when the Dialtone iOS app is in the background. Calls may not come through and ring on the iOS device.