Place the cell phone in a bowl of rice and cover it completely. Leave the cell phone in the bowl for a over night. The rice will absorb all the water. Rice will also absorb any moisture that is left inside the mobile. Rice has the capacity to absorb moisture.
first remove the battery of cell phone and make it dry. after drying it totally charge with out switching on after charging for some time u switch on ur mobile.
Remove the battery, wipe dry the battery and phone, and leave them out to air dry for at least a day. Put the battery back in and there's a good chance that it will at least mostly work the same.
There is one way that has come to be most effective. You need to take your phone completely apart. Turn it off, take off the back, take out the battery, sim card and lay the phone near a fan or a went for a day or two without touching it.