Samsung Xbox Game Pass Ultimate

Hi, I have just purchased a new phone.

As part of the deal, I get 12 months subscription to Xbox Ultimate Game Pass.

If I assign the Xbox Ultimate game pass to an existing Microsoft account that my son uses to play his Xbox One Console, can I play games on my Android phone and he play on the Xbox One console with the same account simultaneously?

Or will I be signed out of the Xbox when I attempt to play on my Android phone?

Thanks

:)