It's a real shame that some locales are stipulating the wearing of masks when out. If you're healthy, the WHO only recommends that you wear a mask if you're treating someone with COVID, at which point you shouldn't be handling a phone anyway. Otherwise wearing a mask creates plastic waste and depletes the stock of PPE for those who actually need them.
The data clearly shows that the importance of wearing masks to reduce the spread of the virus. Stop spreading FUD.