Can You Track a Phone That's Turned Off? The Honest Answer

The question shows up in searches roughly five million times a year, and the answer most articles give is wrong in both directions. “No, you cannot track a phone that is off” is technically incorrect on a recent iPhone, and “yes, you can always track an off phone” is a marketing claim from spy-app sellers. The accurate answer is conditional, and it depends on three things: which phone, how recently it was off, and whether you are the owner or a stranger.

The information here comes from Apple’s Find My after power off documentation, Google’s April 2024 Find My Device network announcement, Samsung’s SmartThings Find specifications, the GSMA Device Registry IMEI blocklist process, and federal court filings under the Stored Communications Act (18 U.S.C. § 2703) on what carriers actually deliver to law enforcement.

TL;DR: iPhone 11 and newer keep broadcasting on the Find My network for about 24 hours after you press the power button, accurate to roughly 30 feet outdoors. Android shows the last known location before shutdown, plus a small offline-network feature on Pixel 8 and newer. IMEI tracking through your carrier works, but only with a police report. Anything else (third-party apps, “ping the SIM” services) is fiction.

What “off” actually means on a modern phone

The reason the answer is not a clean yes or no is that “off” stopped being a binary state around 2019. When you press the side button on an iPhone 11 or newer and slide to power off, the operating system shuts down. The application processor goes dark. The screen is black, and the phone will not respond to taps.

But three chips stay alive on a tiny power budget reserved in the battery: the Ultra-Wideband (UWB) chip, the Bluetooth Low Energy radio, and the Secure Element. Apple introduced this in iOS 15 in 2021 and calls it Find My after Power Off. The same architecture lets the phone keep broadcasting an encrypted identifier for about 24 hours, which any nearby iPhone, iPad, or Mac on the Find My network will relay anonymously back to your iCloud account.

Android took longer to get there. Google launched a similar Find My Device offline network in April 2024, but it works on a smaller fleet and is less aggressive about staying on after a full shutdown. Samsung’s SmartThings Find on recent Galaxy phones behaves more like Apple’s model, with a short post-off broadcast window.

The practical effect: if you own a 2019-or-newer iPhone and lose it today, you have a real chance of seeing a recent dot on the map even after a thief powered it down. If you own a 2020 Android, the dot you see is probably the last fix from before the shutdown.

What works, by phone

Here is the table that should sit at the top of every article on this topic and almost never does.

If you do not know which of these your phone is, the iPhone test is fast: open Settings > [Your Name] > Find My > Find My iPhone and look for a toggle labeled Find My network. If it is on, your phone supports the after-power-off broadcast. On Android, the equivalent is Settings > Security & privacy > Find My Device > Find your offline devices, available on Android 12 and later with hardware support.

How the iPhone trick actually works

Apple’s documentation on Find My after power off (support.apple.com/HT212804) describes the engineering in plain terms. When you power off, the iPhone enters Power Reserve. The UWB chip sends a short broadcast packet roughly every 15 minutes. The BLE radio sends a beacon every 1 to 2 seconds at very low power.

Both packets contain a rolling cryptographic identifier. Only your Apple ID can decrypt it. Every nearby iPhone on the Find My network (more than a billion devices globally) listens for these beacons in the background and forwards what it hears to Apple’s servers. The relaying iPhone never sees who you are, only an opaque blob.

When you log into iCloud.com on a computer and open Find My, Apple’s servers match the beacons against your decryption key and show the relayed positions on your map. The dot you see is “X minutes ago”, and the accuracy depends on how close the relaying device was. In a dense urban area like Manhattan or San Francisco, the resolution is often within 30 feet because every other passerby has an iPhone in their pocket. In rural areas with few iPhones around, you might see no relay at all, even though the phone is broadcasting.

The 24-hour budget is real and hard. Once the reserved battery for the wireless chips runs out, the phone is silent until someone plugs it in. Pressing power in a hotel safe with no other Apple devices nearby can mean the broadcast never gets relayed, even though it is happening. The phone is “trackable” in the sense that the signal is going out. Whether anything hears it is another question.

What works on Android, and what does not

Google’s Find My Device handles powered-on Android phones well and powered-off Android phones badly. The reason is mostly market structure: Android is a fleet of hundreds of vendors with different chips, and Google has no equivalent of Apple’s tight UWB integration to push as a baseline.

What you can rely on:

• Last known location. Open google.com/android/find on a computer or another Android. The map shows where the phone was when it last had signal, with a timestamp. If the phone was on Wi-Fi at home before the thief grabbed it, you see your house. If the phone died on the bus, you see the bus stop.
• Pixel 8 and newer with offline network. Limited offline broadcasting, similar in concept to Apple’s but smaller in scale. Useful in cities with many Android users; weak in rural areas.
• Samsung SmartThings Find. On Galaxy S22 and newer, opens a parallel network that uses other Galaxy devices to relay. Works only inside the Samsung ecosystem.

What does not work, despite what apps in the Play Store claim:

• “Track any phone with just the number.” Pure fiction.
• “Wake up the phone remotely.” Not without baseband-level access that no consumer app has.
• “Track without installing anything.” Marketing for spyware that requires installation, just hidden.
• Third-party “Ping IMEI” services. These are scams. The IMEI is not a network endpoint that can be pinged from outside the carrier infrastructure.

If a service is asking for your credit card to “locate any phone in 60 seconds”, the only thing being located is your $30.

IMEI tracking, the real one

The legitimate way to track an off phone, eventually, is through the IMEI and the carrier. The IMEI is a 15-digit identifier burned into the phone’s modem. It does not change when the SIM is swapped, and it is what your carrier (T-Mobile, Verizon, AT&T) uses to recognize the device on the network.

When a phone is fully off, no SIM is registered to any tower. The IMEI is invisible. The instant the phone powers on near a tower (any tower, any country, any SIM), the modem performs a handshake that includes the IMEI. If the carrier has flagged the IMEI as stolen in their database, two things happen at once:

1. The carrier blocks the SIM from registering, which means no calls, no texts, no data on most networks worldwide that share the GSMA stolen device database.
2. The carrier records the cell tower the handshake came from and notifies the police if there is an active case attached to the IMEI.

You cannot do this yourself. You file a police report with the IMEI (find it on the original box, on the back of the SIM tray on iPhone, or under Settings > General > About if you still have the device), and the carrier coordinates with police. The location handed back is tower-level (often a 0.5 to 5 mile radius), not GPS-level. It is enough for a search warrant, not enough to walk to the phone yourself.

The single biggest reason most stolen phones never come back: thieves know this, and a competent reseller will pull the SIM, factory reset the phone, and ship it to a country with weaker IMEI enforcement. The FBI estimates roughly 60 percent of stolen US iPhones end up in markets like Hong Kong, Vietnam, or the UAE within four weeks. The IMEI flag still works there in theory, but enforcement is patchy.

What to do, by scenario

The right action depends on whether you lost the phone, had it stolen, or are dealing with something more serious like an abusive partner or a missing person.

Lost it (left it on a bus, in a coffee shop): Open Find My or Find My Device on a computer immediately. Mark as Lost mode (iPhone) or Secure Device (Android). Call the number from another phone. Most lost phones come back within 48 hours through the lock-screen contact info that Mark as Lost displays.

Stolen, calmly: Same first steps, plus call your carrier to suspend service and flag the IMEI. File a police report with the IMEI. Do not chase the dot to a stranger’s address; let police make the visit if there is one to make. Most cities will not, but the report is required for insurance and to lock the IMEI. Our stolen phone recovery guide walks through the first 30 minutes in order, with the exact carrier numbers and what to ask for.

Stolen, in danger (mugged, carjacked): Call 911 first. The phone is replaceable; you are not. Once safe, do everything in the calmly-stolen scenario above.

Family member missing, phone not responding: This is the scenario where the 24-hour iPhone window matters most. Open Find My from your own iPhone or iCloud.com immediately, before the window closes. If you suspect foul play, call 911 and the National Center for Missing & Exploited Children at 1-800-843-5678 for minors. Phone-tracking is one data point among many; do not rely on it alone.

Suspected abusive partner controlling your phone: A different problem. If the phone keeps appearing on someone else’s Find My after you turn it off, the issue is not whether the phone can be tracked while off, but who has access to your Apple ID or has installed stalkerware. Contact the National Domestic Violence Hotline at 1-800-799-7233 for safety planning before you change passwords or factory-reset; the wrong sequence can tip off the abuser.

The myth of remote power-on

This deserves its own paragraph because it appears in news articles, novels, and bad action movies. No, the police cannot remotely turn your phone on. No, the FBI cannot turn it on. No, your carrier cannot turn it on. No, an Apple ID administrator cannot turn it on.

The reason is hardware: when you fully power off, the application processor and the operating system are not running. There is no software listening for a “wake up” command, because no software is running at all. The radios that stay alive on iPhone 11 and newer are doing one thing (broadcasting an encrypted beacon), and they cannot accept commands. They are emitters, not receivers, by design.

The closest thing to remote wake is a sophisticated baseband attack that exploits a vulnerability in the modem firmware. Researchers have demonstrated this in lab conditions on specific older phones. It is not a tool the average police department has, and it does not work reliably on patched modern devices. If your threat model includes nation-state-grade adversaries, this article is not detailed enough; consult a security professional.

For everyone else, the honest answer to “can someone track my phone after I turn it off” is the one the table at the top gave you. About a day on a recent iPhone, last-known on most Android, and IMEI tracking with a police report on anything. Past that 24-hour window, the device goes silent until it powers on again. Your job is to use the window you have.