Can you please help me to build phone app where I'll be able to recognise weather my phone call was received or aborted ?

Alas, we're only developers and not wizards 😞 I suggest that you search Google and StackOverflow for some guidance (is it possible ? is there already an app for that ?) Then, if in the building of your Android application, you have a question on how to use the Kotlin language or some of the

androidx-ktx

libraries you may need, then I'd be glad to help you 🙂

be careful with privacy concerns in your app purpose.