My DH and I have always left mobiles etc in bag on/under lounger when we go in the pool or sea but I'm travelling for a week with my mum and she thinks this sounds dodgy and that we won't both be able to go in the water together. It's made me wonder if we've been to trusting in the past but I can't see what else you would do? One of those clear pouches round your neck for your phone? I've never seen anyone using one so can I ask what you all do?