Don't go that far...
I went swimming with my BRAND NEW phone 4 years ago... found it in the bottom of the lake 800 feet out about an hour later (just chilling in the sand).

Took the battery out, left it out in the sun. Used a hairdryer on it at night. Left it out in the sun another day, then used the hair dryer again. Tried turning it on - dead. Plugged it into the wall, and it slowly booted up. Had to replace the battery, but the phone worked for 3 years after that. Speaker died after about 2 years, and SIM kept disabling after 2.5, but i got through 3 years! It was an LG TU915....