Unknown tracker alerts on iPhone and Android: how to find the device and what to do

If your iPhone shows “AirTag Found Moving With You” or your Android phone shows “Unknown tracker alert,” a Bluetooth tracker that is not registered to you has been traveling near you. It may be a friend’s keys in your bag, or a tracker that someone slipped into your belongings. The alert does not tell you which, so the job is to find the device, check what it says about its owner and decide what to do. Do that before you do anything else, and do it somewhere safe.

The two platforms work differently, so the steps are split below. Both come from Apple’s and Google’s own support pages. Where a detail is not on those pages, this article does not state it.

On an iPhone

Apple’s support page on unwanted tracking says iPhones running a recent version of iOS can alert you if an AirTag or a compatible Find My network accessory that is separated from its owner is moving with you. The alert text for an AirTag reads “AirTag Found Moving With You.” To act on it:

1. Tap the alert. The Find My app opens and lets you play a sound on the device.
2. If you cannot hear it, use Precision Finding where your iPhone supports it, or search the places a small disc would hide: coat linings, bag pockets, the car’s door pockets, under seats.
3. Once you have it, hold the top of your iPhone near the tracker. Apple says an NFC tap opens a web page showing the serial number and the last four digits of the phone number of the registered owner, and Apple notes that you can disable the tracker by removing its battery.
4. Take photographs of it and of its serial number before doing anything else, as discussed below.

If the alert did not appear but you suspect a tracker, you can scan manually. Apple’s support steps for finding unknown trackers point to the Find My app, and the exact path depends on your iOS version; check Apple’s page for the one that matches yours.

On Android

Google’s help page says unknown tracker alerts are on by default for Android 6.0 and later devices, and that alerts can reach you when an unknown Bluetooth tracker is detected moving with you. You can also run a manual check: open the unknown tracker alerts setting and use “Scan now.” The scan takes about 10 seconds. Where that setting sits varies by phone maker and Android version, so follow the path on Google’s page for your phone.

Two limits that matter. First, Google states that the alert is shown once per tracker per day. Second, if you tap “Play sound” to locate a tracker, the owner is not notified. Both are on the support page. Apple also publishes a Tracker Detect app for Android, which scans for AirTags and Find My network accessories; it is a separate manual-scan tool and not a background monitor.

What the AirTag is and is not

Apple’s product page describes an AirTag as running on a replaceable CR2032 battery, lasting more than a year, and rated IP67 for water and dust resistance. It connects through Apple’s Find My network, which Apple says includes more than a billion devices. Those numbers describe the product as the maker specifies it; they do not tell you how often one is used for stalking. Apple’s alerts exist because it can be.

The detection is also not complete. It only works for trackers that follow the Find My or Google protocols and are separated from their owner. A tracker that stays with its owner, who is next to you, will not trigger an alert. A cellular GPS tracker hardwired into a car, which has no Bluetooth link to your phone, will not show up in these scans at all; see the guide to checking a car for a GPS tracker and where they are usually placed.

Before you disable it

Removing the battery or turning the device off is a sensible instinct if you are scared. It also destroys the live link that police might use. If you are not in immediate danger, photograph where you found it, photograph the serial number and the NFC page if you read it, and record the time. Then contact the police and give them the device. If you are in danger, disable it and leave; evidence comes second.

A tracker found on you or in your belongings can be a crime. The Congressional Research Service reported, citing the Bureau of Justice Statistics, that 3.4 million people were stalking victims in 2019, that 80 percent of cases involved some technology, and that 14 percent involved being tracked with an electronic device. The same report says the protections that exist reach only a subset of victims. In other words, your state may have a specific law, or it may not. Our look at who plants GPS trackers in court opinions shows how courts have handled this.

False alarms and what causes them

The simplest cause is that someone you travel with owns an AirTag on their keys, and you carried your things in the same car. The alerts exist for a reason, so treat each one seriously, but do not panic before you look. Ask the people you were with. Check shared bags and borrowed jackets. If the item turns out to be a friend’s, no harm done.

The reverse error matters more. An alert that you dismiss and never revisit is a missed warning. Android’s one-alert-per-day rule means a second alert may not arrive for hours, so manual scanning is the way to check again.

Prevention and routine

If you have been through a stalking situation, or fear one, schedule a manual scan on both platforms now and then, especially after time with someone you have a conflict with. Keep location services on, since the alerts depend on it, and keep your phone’s software current. If you need help planning, the National Domestic Violence Hotline is at 1-800-799-7233 and works on safety planning that includes technology. For the general routine around checking your environment, see our counter-surveillance guide.

What to tell the police

Bring the tracker if you have it, the photographs, the time you got the alert and the places you had been that day. Mention anyone who could have had access to your bag or car in the previous days. Tell the officer what the phone alert said, word for word if you can, and show the screen. If the tracker’s NFC page showed a partial phone number, give that too; it is a lead for them, and you should not call the number yourself. Ask for a report number, and if you are afraid of the person you suspect, say so, because that affects what protection is available.