Would you please share SIP solution for iOS and Android.
In our requirement we are building a custom Mobile application that will connect other mobile user who have already installed this custom mobile application ( for example Line, Whatspp etc., ) and freely to talk
Although no-one really used it, and it has been removed in recent versions, Android has a built in if not well documented, SIP phone. Even the current version has the underlying protocol libraries although I don’t know if third party products use them. That’s the limit of my knowledge on Android. I know less about iOS, except that you cannot expect to make a SIP call to an i-Phone, just using SIP, as you have to use a push server, as well.
There is no reason to believe that Joshua knows anything more about these platforms than he has already stated, as this forum is not the right place to ask about mobile phone SIP user agents and libraries…