How I connect to the microphone on my phone while on a desktop meeting

[juditsaez]

Hello, 

My Zoom app on my mobile phone (iOS) and my Zoom app on my computer were linked, allowing me to switch to the microphone on the phone when I was in a meeting on desktop, so I didn't have to use the built-in mic on the computer. But I disconnected that during a meeting and now I can't find the way to link them again - the option to switch to the microphone on the phone doesn't show up anymore.

How can I set it up again?

Thanks