Well … MSFS is not really running on my mobile phone. I was testing a software called “spacedesk” (https://spacedesk.net/) which allows to extend your windows desktop to your phone. I moved the MSFS window to my phone and it works 
The sound is from my desktop speakers not from my phone.
I have no real application for this yet but that might come. Maybe move Mylittlenavmap or an instrument to the phone 