I think the intent of the "no radios" rule is clear. We can debate whether or not Bluetooth or WiFi, or GSM or CDMA "cellular" technology really causes problems. But it's just nitpicking IMHO to claim "my kind of radio device is ok because it wasn't specifically mentioned."

Until they change the rules, I assume that anything with any kind of a transmitter in it has to be off for the entire flight (or its radio function disabled in the case of some laptops, PDAs and smartphones). Excepting cellular (or "mobile" in the rest of the world) phones which can be turned on at touchdown.

My guess is that either the airline "announcement-writer" (whatever that job title is for the person who writes the standard announcements for the FAs - they aren't supposed to ad-lib), or the FAs themselves, are not as well versed as many of us FTers on the intricacies of different types of RF-emitting personal electronics. So they say "cellular technology" because they haven't been trained better, but they really mean "anything that transmits".

Just keep the darn thing off, m'kay?