Fix your iPhone
You accidentally drop it in water. Switch off the phone and use a dry cloth to absorb water as quickly as possible (every second counts!). Remove the cover to avoid any moisture being trapped. Use a dryer to air-dry it and stuff it in an air-tight Ziplock bag full of dry rice. Your screen is frozen. Switch it off and on again. Doesn’t work? Press the home button along with the power button. Your screen is smashed. There’s not much you can do, but next, time get a tempered glass screen protector—it ensures your screen never gets smashed again.