There is a compartment in each seat, or at least there was when it first opened, but they haven’t been used in years. Slowed people down too much. At all locker rides except FJ, the free locker is only a few inches high so keep that in mind. For FJ, phone etc in pocket can be fine, just depends on the pocket. Pockets that zip or button shut work, and tight jeans pockets that aren’t too shallow are fine. If you have any doubt just put it in a locker. Without spoiling things, due to certain movements the ride makes, loose pockets are not secure at all and you should not expect anything to stay in them.