If the iPhone is in "Airplane" mode, it doesnt check for network, or wifi too ( I think ). The whole point of "Airplane" mode is to prevent network communication. If the iPhone violated that they wouldnt get FCC approval.
Proper method to shut down / switch off the iPhone is to press and hold the Sleep / Wake button, then slide to power off.
Simply pressing the Sleep / Wake button once just puts the phone to sleep, during which it still connects to network regularly to check for email and stuff. |