1 If your phone falls in the ocean or another form of salt water, rinse it with fresh water before salt crystals can form in the phone after the removal of the battery. 2  Get rid of battery and put in bag of rice for 24 hours. Try removing all the cell phone parts, and then put into dry rice. 2  It is possible to purchase commercial wet cell phone emergency kits. 3  It's probably best to buy one just in case as you can waste valuable time going to the store to buy one.