After succumbing to some kind of evangelical magic for two years or more, my friend upgraded their carrier branded phone to their first new iPhone 5s with iOS9. My friend has been very accustomed in the past to powering off their previous phone in the evenings to prevent calls and messages, so naturally in the evening they power off their new iPhone completely shutting it down then booting up in the morning. I suggested the idea of just turning the phone to airplane mode to prevent any calls or messages coming through and that the iPhone is designed to remain on in a sleep/wake cycle instead of being shut down and rebooted daily. Questions were raised from the discussion that seemed important for the MR forums to tackle: Are there any issues fully shutting down and booting the iPhone on a daily basis? Does this behavior affect the longevity of the device? Can the iPhone be tracked while in airplane mode or when fully powered down? What's the proper way to treat the iPhone?