I need to change or customize the call screen when initiating a call on Android.
After searching on google I do not find any way to do it.
There is no way to send DTMF tones during a call, the idea is to send a specific number to the call screen. So when a call is made is possible to see the number to dial during a call to the PBX.
I tried to putting the number in the "status bar", but the notification hide after seconds and it is not practical.
I appreciate any other suggestion.
Thanks