I have problem with my app, I think I did not face this problem some times ago.
I have an object that if clicked then it will dial an USSD directly from the app so it does not need to open the dialer (unlike the android.intent.action.DIAL and the tel:01234) but I got an error.
If I do not forget, mine also works too in prior time. It successfully dial the number directly from the app without having to open the Dialer. Nevertheless, it does not work anymore for now.