The phonecall component stops listening to phone state changes after closing the app. Therefore I prepared the PhoneStateListener extension, which is able to listen to phone state changes of your device also if your app is not running. The itoox-wrapper library from @Kumaraswamy is used, which helps to directly invoke Itoo (if present) to call procedures from the background.
Available blocks
Phone states are
Complete documentation, example project and extension available to download at
Taifun