You need the victim to press "trust this computer" or similar on their phone display, unless you have a zero day vulnerability up your sleeve. If you let the p

You need the victim to press "trust this computer" or similar on their phone display, unless you have a zero day vulnerability up your sleeve. If you let the phone display the prompt, you might infect a couple people but somebody will soon tell the shop staff, or even the police. If you have a zero day then you are probably targeting some particular people, let's say diplomats, protestors or attendees of an important international conference. The chances of the average person being a victim of these attacks because they charged their phone at a cafe are negligible.