Apple's website states that the Watch will have an Airplane Mode function. Has anyone found any information on what the phone will still accomplish while in Airplane Mode? Aside from telling time and giving you access to data (contacts, messages, etc.) stored on the watch, I'm thinking it will still track movement and heart-rate since those don't send out any kind of signals, correct? And does the watch work solely through Bluetooth waves which then connect to the phone which then connects to a 4G network? I'm asking because I used to have a Fitbit Force before they were recalled. I loved it but was very concerned about the radiation emitted through Bluetooth. If the Apple Watch could be used as a functional watch + Fitness Tracker without the radiation that would be awesome.