Please download our latest VoIP SIP SDK for iPhone with stable background mode:
Change log:
– added swift3 example app
– added new settings RegisterTimeout/InviteTimeout
– added OPUS codec
– fixed handling network connection state when TLS transport used
– redesigned background mode implementation, added ability to initialize SDK with disabled background mode
– redesigned code, which handles switching between networks when selected TCP transport
– added ability to start SDK from push notifications
– added ICE support (new setting _phone.config.enableIce)
– added CallKit example app