You can enjoy crocheting a cell phone case or cell phone holder with any of the free crochet patterns linked below. They'll work just as well for holding similar gadgets in the same general size range; they make great camera cozies for small cameras too.
Crocheted cell phone holders make fantastic gifts.
This pouch-style cell phone holder is sized to fit the Apple Iphone 3GS and other similar cell phones. It could also hold other types of gadgets, or other items all together, if you prefer.
The cell phone holder has a ribbon drawstring at the top. A v-stitch edging adorns the upper edge. This project is crocheted using size 3 crochet thread and 6/0 seed beads.
At the Red Heart website, find a free pattern for a cell phone holder plus several other beginner-friendly projects, all crocheted using Red Heart Super Saver.
If you're looking for a more substantial project than just a little cell phone holder, this bag is an interesting project to consider crocheting. It's a full-sized purse with a little cell phone pocket attached.
This clever pattern is written to fit just about any cell phone or gadget you might want to make a holder for. The free pattern is posted at the Garn Studio website.