I've got a number of pants and shorts that I'd love to be able to carry my phone in, especially a couple of running shorts. But, they were (inconsiderately!) designed with no pockets.
In the case of too-small pockets, I've sometimes modified the garment to enlarge the pocket by cutting the inside and adding more fabric. But how should I go about adding a pocket if there's no pre-existing opening?
I would like to have a pocket approximately the dimensions of a smartphone, and wouldn't put anything heavier than the smartphone (and maybe one car key) in it. There's no liner, just one layer of fabric (spandex) with a hem at the side of the legs. The waistband is a separate piece sewn on top, not a fold-and-sewn waistband.