Cell phone manufacturers including Apple, Samsung, and Google claim their devices are water resistent, waterproof, or otherwise safe to use in water or wet environments. This short piece by ifixit is worth reading if you use your devices near liquids and care about what happens if they get wet.
Sources:
https://www.ifixit.com/News/your-phone-is-never-waterproof-no-matter-what-the-maker-says