Sam, keep in mind that even though you turn the main device off, parts can still continue to run wihtout it. Same goes for computers that have been turned off but have a LAN boot enabled so you can boot them up remotely by sending a command to it. Same process can be EASILY applied to any cellphone if someone would want to.
I highly doubt the cellphone manufacturers would allow such a thing though.
I highly doubt the cellphone manufacturers would allow such a thing though.