I dropped my phone in my pool

It was probably not a good idea to try turning it on/charging it before it had a chance to fully dry out. It's usually best to turn the device off completely until it has a chance to dry off before trying to use it again—this minimizes the chances of a short circuit damaging the components within.

That being said, you might still be able to open the phone and clean off any contacts on the motherboard that may have corroded to regain functionality. You'll want to follow our Galaxy S21 Motherboard Replacement Guide to remove the back case and access the motherboard. Then use 91% or higher isopropyl alcohol (99% is ideal) to clean off any corrosion you see. If that doesn't work, you'll likely have to start replacing components.

Check out this Samsung Galaxy S20 Won't Turn On Troubleshooting Page for a list of things you can try to get your phone working again. It isn't an exact match for your phone but a lot of that information should still apply. Good luck with the repair!

I learned the hard way also that IP68 may failed on S21 ultra. Previously, I took a few of shallow pool underwater pics with it and nothing happened other than temporary muffled speaker and wet charging port warning.

But this time, trying not to wet the charging port and speaker, I dip HALF of the phone underwater in a hotel pool for a few seconds to take picture and the screen went greenish and camera failed warning shown. I immediately pulled it out and tried to turn it off, then my phone died.

I left it for a few hours while driving home and took it apart, hairdry each components, put the components in a box of rice and later with a box of silica gel overnight. I started to look for replacement parts such as screen, cameras and speakers.

Luckily the next day when I put it together and plug the charger the screen is fine, but it refuses to charge (grey circle with lightning). Press the volume down and power several times to reset it, then it finally started to charge. I then turned the phone on, the screen stills flickers a bit from the water damage but the phone works but with no touchscreen and fingerprint reader. I unlocked the screen with samsung's find my mobile (google find my phone can't do that) and I managed to get the phone connected to my wifi, allowing foldersync to run its job backing up my phone which I set before. With my data safe and sound, I took the components out again, cleaned it throughly and dry it again in the box with silica gel.

I thought I'd have to replace the screen but the next morning turned out the touchscreen and fingerprint reader worked just fine. Maybe I was just lucky, but I think in any water damage, time is critical to immediately turn the phone off and took the components apart for drying. It is also important to give some time until the components are throughly dry. Don't rush to buy components as they maybe durable enough to survive.

My Samsung s21 fell in a bowl of dish water for about 10 secs, I immediately took it out and took the silicone case off it and dried it. The case and screen protector, protected it so wasn't that wet, but did not protect the charging port. I tried charging it but moisture detected in charging port message came up and to dry it with a cool fan. I dont have a fan so I used the cool setting on my hair dryer for a minute. I tried charging it again and it's charging fine now. I've turned it off for a bit and placed it in a bag of rice. Nightmare morning! I hope it will be OK.

I take mine to the water park all the time. I have insurance for a reason