Twilio Voice SDK Integration Troubleshooting in Xamarin Android App

I'm encountering integration issues with the Twilio Voice SDK in my Xamarin Android application that's supposed to make direct calls.
Key Requirements:
- Deep understanding and experience with Twilio Voice SDK
- Proficiency in Xamarin Android app development
- Expertise in handling Auth tokens

I need an expert who can quickly diagnose and fix these integration challenges. Please provide your relevant experience and past projects in your bid.