My app support ringout feature, when set Ringout, all the calls in my app will go to native, by using tel://xxx.
But when my app set as the default calling app by the user. Then when user make a call from Contact, it will jump to my app, but app will will route this call to native.
So there is a issue for this, then the quesion is:
How to check if my app is set as default calling app?