When I talk over SIP by Zoiper for iOS (iphone 5s, iOS 9.0.2) incoming mobile call breaking my dialogue and backgrounding Zoiper. How can I fix it?
This is expected behavior in current releases of Zoiper.
When there is an incoming GSM call while you are in a VoIP one, the VoIP call is placed on hold and Zoiper goes to background.
Ok, but can I change this rule and don't backgrounding Zoiper?
No, this behavior can not be altered. The incoming gsm call is with priority. This is a limitation in the operating system.
And this behavior will be always? Or developer fix it in the future?
It can not be changed in Zoiper side, as this is a limitation by Apple's iOS.
Thanks a lot