The Nokia 6630 is widely known as Charlie which was its codename during development; it's a great name, memorable, cheeky and with risqué conotations.

I'd been wondering what the Nokia 6680's codename was, no-one I knew at Nokia had been letting on, and even the Finns I knew with close Nokia ties didn't know, now thanks to wikipedia I know; it's Cho, a weird name, it doesn't seem to mean anything in Finnish and the only interesting thing I can find from Google is Notorious Cho: the movie, surely this can't be the source of the name, can it?

Personally, I think some of Wikipedia's Cho definitions are more likely, a Myst character? The Japanese word for even numbers? Or perhaps an old Japanese measurement? Who knows? Cho's quite an enigma.