There many cases when the smartphone was dropped in water – in the lake, in the sea or somewhere in your bathroom.
Even in the event the phone works immediately, the water could lead to corrosion which makes the phone eventually quit working. Especially salt water is very dangerous for electronic devices. If you’re sure the phone is linked to the right sort of power supply, check your connections.
The best thing to do in such case, is to turn off the phone, and if you could open the back cover, so the phone can dry asap. .