How to Tell if Your iPhone Has Water damage
Overview
Phones in general were not designed to accomodate water. However companies recognize that water is inevitable and that phones should be designed for a certain degree of water resistance.
Step 1 - Get A Flash Light
See Below
Step 2 - Shine Light Into headphone Port
See Below
Step 3 - There Should Be a Small Tab
If the tab is white your phone is fine. However if it is red then your Device has some water damage. At this point you may need to see a qualified repair shop. Here is a good article on how to repair water damaged iphones from MacWorld.
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