Avi, my primary focus has been on developing applications using AOSP APIs, and I have also gained valuable experience with the Android platform, particularly in connectivity and network management.

One of the key areas I worked on involved utilizing AOSP APIs such as `ConnectivityManager.NetworkCallback` to manage Wi-Fi, Ethernet, and cellular connections within our application. This was crucial for our firmware-over-the-air (FOTA) updates, where maintaining a stable and secure connection is essential.

Here are some challenges I faced and how I addressed them:

1. **Network Management:** Ensuring seamless transitions between different types of network connections (Wi-Fi, Ethernet, cellular) was challenging. I used `ConnectivityManager.NetworkCallback` to monitor network changes and facilitate smooth transitions. This required developing robust logic to detect network availability and switch connections without interrupting the update process.

2. **Handling Network Failures:** Another challenge was managing network failures during critical operations like FOTA updates. To address this, I implemented retry mechanisms and fallback strategies to ensure that the update process could recover from interruptions and continue once the network was restored.

3. **API Limitations:** Working with AOSP APIs sometimes involved dealing with limitations or a lack of direct support for certain features. In such cases, I collaborated with the platform team to find workarounds or extend functionality as needed.

4. **Testing and Debugging:** Testing network-related features can be complex due to the variability in network conditions. I established various test scenarios to simulate different network environments and used extensive logging to effectively debug issues.

While I haven't worked extensively on customizing the Android platform itself, my experience with AOSP APIs has provided me with a solid understanding of how to leverage these APIs for building robust and reliable applications. Collaboration with the platform team has also been crucial in addressing any challenges that arise during development.