This is just a thing no one needs.
Unless you truly want to be “that guy” we don’t recommend this. For one thing, it could make checking your phone on the train in the morning a criminal offense. Also, phones are kind of dirty, actually. Probably more dirty than your penis, so for health reasons we can’t condone this behavior. We also can’t stop you from doing it, we can simply offer these warnings, and then refuse to pay your bail money.