Building a custom android app via ionic. adding linphone SDK in capacitor .
UI layout is done just need to build out the core classes and connect the dots. and do SIP testing
Make sure SIP Call works 2 way audio
Make sure SIP DTMF works (SIP-INFO)
Make sure RTP is flowing correctly
Make sure SIP Inbound CALL is working [do we need a push notification server]
Make sure SIP Register is working with the correct Timers in place .