Why isn’t my phone calling after I dropped it in the pool

@perrinaalberts you want to treat this as you would treat any other water exposed device. Rice does not work. It does absolutely nothing to help you with this repair. All it does is waste time and waste food. Check here https://www.ifixit.com/News/30047/rice-i... for more on this. It is the equivalent of doing nothing. So if you want to take chances, doing nothing may not be your best choice.

The very first step I would take is to disassemble your iPhone. Use these guides iPhone 12 to help you disassemble your phone. Take a careful and close look at all components and connectors. Truly assess the damage. Look for major corrosion, evaluate the pins in the connectors etc,. Take a look at all connectors as well as cable ends. You will have to remove all the EMI shields. If you do not remove the shields, you are not cleaning the board. Once you got the gross contamination cleaned, use 90%+ isopropyl alcohol and clean your parts some more. For a proper cleaning, use this guide. It was written for an Apple iPhone 3G but it is still pertinent to your iPhone as well. I can not stress the importance of a good cleaning enough, so do it over and over while replacing the alcohol after each cleaning. Do not use compressed air for the cleaning since that can drive liquid as well as corrosion particles into areas that will cause trouble later on. Also, you do not need to leave it to dry for a day. Isopropyl alcohol in the higher concentration will evaporate quickly and dissipate the water. The importance here is the cleaning. It would of course be best to get it professionally cleaned with an ultrasonic cleaner. This will at least help if professional cleaning is not available to you. After the proper cleaning, replace the battery. It will fail if you do not take care of it now. After all that, reassemble your iPhone and re-evaluate. Keep in mind that water damage is the toughest to diagnose and repair since potentially any part may have failed. If unsure if you can do this, or if it is to complex, try to contact the experts in water damage and board level repair for more help/guidance.