As a fellow Xiaomi user and seasoned Android app developer, I understand the crucial role our smartphones play, especially with communication apps like WhatsApp. My range of skills in mobile app development using Java and Kotlin align perfectly with what you need to diagnose and resolve this issue.
Over the years, I’ve dealt with numerous software challenges. Troubleshooting has become second nature to me as I relentlessly work on finding the root cause of any problem and supplying robust solutions that don’t harm other areas of your device as per your request.
To help you visualize my competence, I recall an issue similar to yours where users weren’t receiving any WhatsApp notifications after their devices went into sleep mode. Identifying the notification hierarchy challenge, I fixed it by utilizing an advanced adb command that granted WhatsApp explicit permission to display over other apps. With my expertise, these painstaking efforts are no longer a hassle – they're just part of the process.
In conclusion, hiring me for this project means hiring someone who not only has the requisite set of skills you mentioned but also a problem-solver who invests in staying up-to-date on latest technologies and doesn't hesitate to go beyond conventional methods for exceptional results. Let's join forces to extinguish this problem from your Xiaomi HyperOS and restore seamless functionality – because in today's world, every phone call is important.