My phone fell in the water and my screen went blank, what can I do?

i would let it dry out could take a couple of days take the battery out the compartment where the battery will be wet so try and save your battery let it dry for a couple days drying all parts of the phone and if it doesn't do the job you might have to replace it hopefully you have phone insurance so you will only have to pay a deductable if not you'll have to buy a used one