Mobile Phones & iPhones

[ksax2006]

I am currently on vacation in Hawaii, I got a lifeproof waterproof case and tested the case at home and the case was dry inside, after only 5 minutes of being in the water on vacation the case shows signs of water spots so i immediately took the case off and wiped the phone dry but I believe the dammage was already done. is there anything I can do I need a phone ASAP because I am on vacation the nearest best buy in in Honolulu, and my phone is not working it says no sim and the camer and certian apps do not work, Help what can I do ??