How to add more devices to AWS root account MFA

Question

I already have Google authenticator installed in my iPhone and I'm using it to signin to my AWS root account. I want to add the ability to login with MFA using my Android phone as well, using a corresponding token-generator Android app.

Is it possible to add a second device and how exactly? Or is AWS root account MFA bind to one (virtual) device?

Answer 1

When AWS MFA page shows the barcode, scan barcode from different devices (I've tried with 3) at the same time. They creates same code, filled form with same codes and it works.