There is a moisture indicator located on the back of the phone. Take off the back cover and look toward the bottom left corner of your phone. You should see a white square (pink if there is water damage). There is also an indicator on your battery near the gold connectors. To be honest, there may be more indicators that you can't see inside the phone (smart phone manufacturers love to do that). So beware, rule of thumb is if you think it is, it probably is. A little late, hope this helps!