well. I've only used 1 so far and it worked until it worked. I followed the directions and tried it in water with a piece of paper in it. It was successful. I took it out of town and worked in the pool and on the beach. It's a bit inconvenient to use the phone in a pocket. Although he worked on the photo. Things got interesting on Day 2 at the pool. Fog detected in pool. Didn't put much stock in it, just thought my fingers were wet when I pocketed the phone. I take it to take a picture and there's water in there! Moisture notification on my phone and such! Yes, it was completely closed and sealed. I don't know what went wrong, but it definitely didn't work. It's too late to return them, so I'll try the other 2 and pay more attention.
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