I just bought this one the other day: http://www.amazon.com/gp/product/B00OQGJE8S?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
I water tested it with tissue paper and it kept the water out. Then I took it to the pool today to test it and it worked but 2 things I noticed that have me looking for something better:
When it is submerged I see airbubbles coming from one of the holes (the sound hole just to the right of the headphone jack). I saw the same bubbles during my water test (without the phone but with tissue) as well but but since the tissue didn't get wet I tried it with my phone. Long story short, my phone never got wet and I am not sure what is up with the bubbles coming from the hole but it makes me nervous. I think I need to test that part more.
While this may not be the cases fault but probably that of the touch screen sensitivity, when the screen is wet or submerged it goes all wonky like I am pushing all over the screen when I am not. As a result, it was hard to actually use the phone underwater or with any water spots on the screen (it somehow called my wife twice while I was just holding it). I think I will try again with the sensitivity settings turned down and see if that helps.
My main goal of the waterproof case is to just take photos and video underwater. For now I am in the testing phase for this water case but so far I'm cautiously optimistic.
Hopefully someone will respond with something a little more ideal.