Hi All,
I am experiencing the same problem as Bruno on iOS 10 w/3CX 15 (Windows), all latest updated installed as of today (Both client and server).
Inside the subnet where the 3CX Server is everything works fine, 3CX Client launches and shows "On Hook" and "Available immediately"
When I am connected over 4G and launch 3CX Client on my iPhone I get the
Connecting ----> Timeout ----> Connecting ----> Timeout ----> Connecting ----> Available
This also means that the Callkit integration is not working over 4G - I get a notification about an incoming call but when I choose to answer it it stops on connecting and does not pick up the call.
If I have 3CX Client running on screen on the iPhone it works fine over 4G.
I really need Callkit working for staff outside the building so any suggestions would be great.