How do I connect my smartphone to the Audi A3 infotainment system?

I recently bought a new Audi A3 and I'm having trouble connecting my smartphone to the car's infotainment system. I've tried following the instructions in the manual, but it doesn't seem to be working. Can someone provide me with a step-by-step guide on how to do this properly?

To connect your smartphone to the Audi A3 infotainment system, start by turning on the car's ignition and activating the Bluetooth feature on your phone. Then, on your car's display, navigate to the 'Phone' settings and select 'Add Device'. Follow the prompts on both your phone and the car's display to complete the pairing process. Once connected, you can use features such as hands-free calling and music streaming.

As a long-time Audi A3 owner, I've found that the easiest way to connect your smartphone is by using the Audi Music Interface (AMI). This connects your phone to the car's infotainment system using a USB cable, providing a more stable and reliable connection compared to Bluetooth. You can control your phone's music library and navigation through the car's display.