My girls do not have phones. We are old fashioned that way. Well, yes, they technically are old iPhones but have been stripped down to be music/camera/video/calendar gadgets. Like a Touch but without wifi. The girls love their gadgets and carry them everywhere, listening to music, creating elaborate custom backgrounds, taking selfies and recording silly videos of one another. (I came upon the youngest recording a song off the radio the other day with Voice Memo, old school style. Took me back to my days with my boom box and tape recorder. I said, "Um, why don't you just download it on iTunes?" and she said, "Mom, be quiet, you are ruining my recording.")
They are designed to hang on wrists, belt loops, purses or backpacks. (To attach them just squish the cozy through the loop, luggage tag style.) It will save their gadget some knocks and provide a nice place to stash their ear buds.
To make them I modified the small size Gadget Cozy pattern to be a bit taller to fit their 4Ss. I added a dipped rim in back, animal appliques, and Velcro closure. The puppy cozy is actually 5% bigger overall than the grumpy kitty cozy because it needed a little more wiggle room. Second time's the charm.