RemotePhoneControl allows authorized support staff to connect to and view the same telephone at which a user is looking, regardless of where the user is located.

Remote Phone Testing and Training Software from Singlewire
RemotePhoneControl allows authorized support staff to connect to and view the same telephone at which a user is looking, regardless of where the user is located.
To access support materials including download links, user guides, tutorials, the knowledge base and other links, please do the following:
RemotePhoneControl User Guide for iOS - PDF
Support for RemotePhoneControl for iOS