I've been looking for a phone case that I can carry scuba diving and use the phone on the surface. I've read different places that this case (or some newer model of it) is good down to 100 ft. In fact, I saw it at a dive shop and the depth limit had a sticker over it saying a 100 ft. I tested it on two different dives, one to 25 ft. and another to 60 ft. It survived the 25 ft dive, but failed on the 60 ft. one. Either way it won't serve my need. I'm keeping the case to keep sand and the occasional splash off the phone. It would have been cheaper to have used a zip lock.
Update: After wasting money buying cases and scuba diving with them only to have them leak, I've found one that doesn't. I recommend the FRIEQ Universal Waterproof Cases. They say they're waterproof down to 100 ft. I haven't been that deep yet, but I can verify 60' feet. What I can't verify yet is how long it will remain waterproof, but I'm confident enough at this point to put my phone in it.