Change of smartphone 🤳

On the centre screen, delete your old phone, then add your new one. The phone number doesn't matter. You will need to rebind your new phone with the car after installing the iSmart app. Android auto should already be installed on your new phone so there should not be a problem there

In the end, it wasn't at all complicated.
After installing Ismart on my new phone, I went into the MG3, engine running, BLUETOOTH activated and it asked me if I wanted to link this new phone. And that was it! Android auto worked without a hitch.

I didn't even have to delete the old phone in the MG3.