How to troubleshoot Bluetooth connectivity issues in Audi A1?

I'm having trouble connecting my phone to the Bluetooth in my Audi A1. It worked previously but suddenly stopped. What could be causing this and how can I fix it?

The first step is to make sure your phone's Bluetooth is turned on and searching for devices. In your Audi A1, go to the Bluetooth settings and delete any previously paired devices. Then try pairing your phone again. If this doesn't work, try resetting your phone's network settings.

Another possible solution is to restart your Audi A1's infotainment system. Press and hold the power and volume buttons simultaneously for about 10 seconds. Then try pairing your phone again.