Why can't I take an underwater picture with my iPhone 4s?

I bought the life proof case and it says you can't take underwater pictures, but when i touch the screen it does't do anything. I have to be above water if I want to open the lock screen It will not let me touch the screen under water. Why? I bought it yesterday along with the phone and have taken it in the water twice.

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  • Why doesn't Wi-Fi work underwater? I know it's obviously not MEANT to work underwater, but why does it not work AT ALL? I went underwater with my iPhone 5 in a waterproof case and as soon as I went in the water I got zero reception. I have an iPhone 5.
  • Why doesn't Wi-Fi work underwater? - 1 I know it's obviously not MEANT to work underwater, but why does it not work AT ALL? I went underwater with my iPhone 5 in a waterproof case and as soon as I went in the water I got zero reception.
  • Why does the iPhone 4 lifeproof case only go up to 6.6 feet underwater? I'm going to buy one of these case but I'm just curious to what happens if you go further than 6.6 feet?
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