How to Track an iPhone Even When It’s Powered Off

First thing’s first: the “Find My” app and the “Find My network” are not the same thing. The app is what you open on another device to look for your iPhone, but the network is a hidden Bluetooth crowd‑source that lets the phone be found even when it isn’t online. If that second toggle is off, you’re basically looking for a needle in a haystack.

Head over to Settings → your name at the top → Find My → Find My iPhone. Turn on both the main “Find My iPhone” switch and the “Find My network” switch underneath it. While you’re there, flip on “Send Last Location” – this tells the iPhone to whisper its spot to Apple the moment the battery gets critically low.

Don’t forget the basics: Location Services (Settings → Privacy & Security → Location Services) and Bluetooth need to be enabled, too. And for the network to work, your iPhone must have checked in with Apple within the last week.

Apple even added a handy visual cue. Pull down the Control Center, press and hold the power button, and you should see a note that says “iPhone Findable After Power Off” right under the slide‑to‑power‑off bar. If you don’t, double‑check the toggles above.

Now, what happens when the phone actually gets turned off? If it’s an iPhone 11 or newer (the models with the ultra‑wideband chip) running iOS 15 or later, the device will stay searchable for roughly 24 hours after you shut it down, assuming there’s still some juice left in the battery.

When the battery finally hits zero, the phone doesn’t just die instantly. On iOS 15.2+ it slips into Power Reserve mode – a low‑power state that can last about five hours. During that window it broadcasts a faint Bluetooth signal, much like an AirTag, so nearby Apple devices can relay its location to you.

Even after the signal fades, Find My will keep showing the last known spot for up to seven days. That’s often enough to jog your memory (“Did I leave it at the café?”) or to give you a starting point for a recovery effort.

If you finally accept that the device is gone, flag it as lost in the Find My app or on iCloud.com. Lost Mode will lock the phone with a custom message and a contact number. Thanks to Stolen Device Protection, anyone who powers the phone back up will need Face ID or Touch ID to disable Lost Mode.

Pro tip: prevent thieves from slipping your iPhone into airplane mode. Go to Settings → Face ID & Passcode, scroll to “Allow Access When Locked,” and turn off Control Center. Siri can stay on – it will ask for authentication before changing any critical settings.

Bottom line: keep Find My and its network turned on at all times (unless you’re deliberately wiping or selling the phone). It not only helps you hunt down a lost iPhone, it also works for AirTags and other compatible accessories, and it makes the device far less appealing to a thief.