I, too, suddenly jumped into the smart-age this spring, after I had changed my old phone for a brand new pink Nokia Lumia 800. Really great phone, by the way! I love it! And especially love the girly colour :)
Anyway, I didn't want it to get scratched, so I knitted this cover for it:
Pattern: my own
Needles: 2 mm
Yarn: Novita Tennessee
Then, a friend of mine who also bought the same phone (but in blue), wanted to have some covers too. So here's what I made for him:
Two different ones so that he can change it once in a while (and maybe wash it). These are also knitted with 2 mm needles using cotton yarn.
I actually plan to write down a pattern for this, as I've already promised to knit yet another one of these for a third Lumia phone. The cover-thingy isn't actually at all difficult to make, but perhaps there's someone out there who would still want to have it written down. So maybe you'll hear more about that later this summer!