The notification "The call service is ready" is coded in our React Native SDK and Flutter SDK. If you use either of these SDKs, please take a look at the implementation of WebRTC and WebRTCCallService.java so you can remove unnecessary push notification functionality.
You may check these GitHub paths depending on the SDK:
Please refer to the corresponding documentation:
React Native SDK - Video Calling | React Native SDK | QuickBlox
Flutter SDK - Video Calling | Flutter SDK | QuickBlox
Also, you can change the text of the notification for both SDKs in the following file on GitHub: /android/src/main/res/values/strings.xml.
Additionally, you can change the logo by replacing the files ic_call_service_large.png and ic_call_service_small.png in the following folder on GitHub:
Feel free to check our official documentation for more information that will help you to integrate QuickBlox services into your applications / projects or contact our Support team by submitting a ticket if you have any other questions.