My phone fell in a swimming pool, what should I do?

Sofia Borges  you will need to treat it like any other water immersed device. The very first thing you want to do is to not try to restart/sync the phone. This may further damage your phone. The next thing to do is to clean it. Disassemble your phone using the help of videos like this as well as https://www.youtube.com/watch?v=CLVjt9t7...|this one]. You must remove all the EMI shields of the logic board. If you do not remove those you are not cleaning 3/4 of the board. Clean everything with +90% (no less than 90%) isopropyl alcohol. Follow this guide, and even so it was written for an Apple iPhone 3G all the points are still pertinent to your phone. Pay particular attention to the SMD components, check for charred missing or broken missing. You can then dry the board in an oven or equivalent at 220deg F (not higher;-) for a few hours. Best way to clean it would of course be through an ultrasonic cleaner. Consider professional help with that When it is properly cleaned, replace the battery. All these steps are to avoid delayed failure caused by corrosion. Once all this is done, reassemble your phone and reevaluate. Until you have done the cleaning you really can’t properly determine what is going on with your phone. You can always consider professional help with that and contact microsolder experts that specialize in this kind of work.