none of that will work. If you intend to ever call anybody you going to have to have some kind of a signal going on that phone and once it's on it can be tracked. There are even ways that if they really wanted to they can override airplane mode as long as you have a battery in that device it can be tracked it can be controlled remotely they really wanted to taking turn your camera on a cat turn your microphone on and you wouldn't see any indication that it's actually on because they've hacked the operating system