Share your experience!
first, you should not plug anything to the phone when it is wet.
have you tried using the other headphones? ( i know it works with other devices but just try,)
try to clear data of the smart connect app
try to restart your phone,.
as you have said you dropped your phone, something might have jarred inside, so it is better to have your phone checked at your local service center,.
I got your message, you don't jailbreak androids, you root them, and that's the only way other than a custom ROM to change the font, unless you want to change the font on a specific app, sometimes it allow you to do so.