I use an Orvis Otter Creek vest (which is currently on sale). I picked that one b/c it has a water proof pocket in the front where I can store my phone. With my old vest, I put the phone in a water proof bag in the back of my vest. It would not fit in a pocket on the front with all my fishing gear. Since I basically had to remove the vest to get to it, I never answered it - not a good thing when your spouse is trying to reach you b/c you are late getting home for a dinner party!
(I was so focused on a "riser" and had lost track of time........never mind, he had a right to be upset!) Anyway, I solved the phone storage problem with the water proof pocket on the Otter Creek vest.