If you want to make a similar one, just a few quick indications for the pattern (without motif) :
*** Apple Iphone5 crocheted basic case ***
1* - chain 20 with a 2.25mm crochet hook (USA: 1/B, UK:13). I find it better to choose a cotton thread (for upholding and durability). You will work in rows (not spiral)
2* - chain one; *single crochet in every loop* in the 19 first chains. Single crochet 3 times in the 20th loop. *single crochet in every other side of the loops* in the 19 next stitches. Single crochet 3 times in the 40th loop. Slip stitch in the first chain.
3* -chain one; crochet in the back loops of the stitches only, all around. Slip stitch in the first chain at the end of the row. You'll have 44 stitches around.
4* -go on with rows. Check after a few rows if the size is correct for you phone: make a few more or less chains at the basic chain at the beginning to adapt the size (the size may vary depending of the tension of your thread and fingers). Make as many rows as you need to cover the whole phone. I love to make a little strip with a snaps fastener at the top of the case. I sometimes add a large strip at the back (sewn or with snaps fastener) to attach the case to a belt (for work for example).
The new case with an old one made with a wool/acrylic blend (for HTC Desire)