I just tried to on-board a rando, and he was unable to download either Muun or Phoenix from Play store without adding details such as email / debit card etc.
Looks like he was running stock (google) android on a low end phone.
Why might that be? How can he download a wallet without doxxing himself? (except the fact that he's already running full google, lol)
helping him install Graphene might be a bit much, plus it wasn't a Pixel