To lock a missing iPhone from your Apple Watch, open Find Devices, select the iPhone, tap Lost Mode, and turn it on. Apple calls this protective action Lost Mode—it is not a separate ordinary “Lock iPhone” button.
Lost Mode locks the iPhone with its passcode, displays a message and contact number on the Lock Screen, and suspends applicable Apple Pay cards. If the phone is offline, the request may remain pending until it reconnects.
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Before you start
- Find My iPhone must already have been enabled before the iPhone went missing. The Apple Watch cannot create remote tracking or Lost Mode access after the fact. See Apple’s Find My guidance.
- Your Apple Watch must be signed in appropriately and able to access the Find Devices service.
- Have a phone number you can actually answer and a short message ready.
- If the iPhone is offline, Lost Mode can be queued and shown as Pending until the phone connects to Wi‐Fi or cellular service.
App labels and layouts can vary slightly by watchOS version, language, and region. Look specifically for Find Devices on the watch; the app is not necessarily labelled “Find My.”
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- Open the Find Devices app on your Apple Watch.
- Select the missing iPhone from the device list.
- Tap Lost Mode.
- Tap to turn on Lost Mode.
- Follow the onscreen prompts. If requested, create or confirm a passcode, then add a callback number and message.
- Confirm the action.
Apple’s documented path is Find Devices → iPhone → Lost Mode → turn on Lost Mode. For the official Apple Watch instructions, see Find misplaced devices with Apple Watch.
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Use a simple message such as: “This iPhone is lost. Please call [your number].” Avoid putting your home address, Apple Account details, email password, or other sensitive information on the Lock Screen.
What Lost Mode does
When the command reaches the iPhone:
- The phone is locked and displays your message and contact information on its Lock Screen.
- The existing passcode is required to unlock it. If the iPhone did not previously have a passcode, Find My may prompt you to create one.
- Applicable Apple Pay cards and related services are suspended or removed from that device. This does not cancel the underlying bank cards.
- The iPhone can still receive phone calls and FaceTime calls.
- Notifications, messages, and alarms generally do not produce their usual alerts or sounds while the device is marked lost.
- You receive a confirmation email at the email address associated with your Apple Account.
Lost Mode does not power off, erase, or permanently destroy the iPhone. It protects access while leaving open the possibility of recovering the device.
Understanding “Pending”
If the iPhone has no power or network connection, Find Devices may show Lost Mode as Pending. That means the request has not reached the phone yet—not necessarily that it failed. The lock and Lock Screen message take effect when the iPhone reconnects to Wi‐Fi or cellular service. A phone having no current location is a separate issue: Find My may be unable to report where it is even though a Lost Mode request is waiting.
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- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
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If the iPhone may be nearby
For a phone misplaced in your home, car, or office, use Play Sound before marking it lost:
- Open Find Devices on the Apple Watch.
- Select the iPhone.
- Tap Play Sound.
When the iPhone is online, the sound begins after a short delay and increases in volume. Apple says it plays for approximately two minutes. If the phone is offline, the request may remain pending and play after it reconnects. See Apple’s Apple Watch Find Devices guide.
If the iPhone may have been stolen or left in a public place, activate Lost Mode immediately rather than relying only on Play Sound.
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If your iPhone does not appear in Find Devices
- Open the full device list in Find Devices; it may not be the first item shown.
- Confirm that the iPhone and Apple Watch use the relevant Apple Account.
- Check whether Find My iPhone was enabled before the phone disappeared.
- Make sure the watch can connect to the Find Devices service.
- Try Find My on another signed-in Apple device or visit iCloud.com/find.
Family Sharing may allow family devices to appear, but it does not guarantee unrestricted control over every family member’s iPhone. Available actions depend on ownership, account status, and permissions. If Find My was never enabled, Apple’s Lost Mode workflow may not be available for that phone.
How to unlock the iPhone after finding it
Once the iPhone is safely back with you, you can enter its passcode directly on the device to turn off Lost Mode. You can also disable it remotely:
- Open Find My.
- Tap Devices and select the iPhone.
- Tap Pending or Activated under Mark As Lost.
- Tap Turn Off Mark As Lost and confirm.
Alternatively, sign in at iCloud.com/find, select the iPhone, choose Lost, then select Stop Lost Mode. Do not erase or remove a recovered iPhone from your Apple Account unnecessarily.
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- GET SMARTER HEALTH INSIGHTS—Apple Watch SE 3 is an advanced health tracker that helps you better understand your body. The smartwatch sends alerts for an irregular heart rhythm, or an unusually high or low heart rate.* You can view your overnight health tracking metrics with the Vitals app,* track your sleep score, and get sleep apnea notifications.*
- A GREAT FITNESS TRACKER—SE 3 can track your workouts in a healthy number of ways—from running and strength training to simply achieving your 10K steps a day. With real-time metrics and Workout Buddy powered by Apple Intelligence from your nearby iPhone,* you’ll hit your goals like never before.
- KEEP HELP CLOSE AT HAND—SE 3 is a smartwatch that can detect a hard fall or severe car crash and automatically help connect you to emergency services and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- WOMEN’S HEALTH INSIGHTS—SE 3 has advanced sensors that track your wrist temperature while you sleep. With this smartwatch, you can log your periods and symptoms, get period predictions, and get notified of cycle deviations.*
- GREAT BATTERY LIFE AND FASTER CHARGING—Enjoy a smartwatch with all-day, 18-hour battery life* from sunup to sundown. Then charge up to twice as fast as SE 2* and get up to 8 hours of battery in just 15 minutes.*
If you believe the iPhone was stolen
Keep Lost Mode active while you assess the situation. It locks the phone, shows your callback details, and preserves the possibility of recovery. If your data is at serious risk and recovery seems unlikely, consider remote erasure—but understand that erasing is separate from Lost Mode and is effectively irreversible from your perspective.
Erasing does not necessarily remove Activation Lock while Find My remains enabled. Activation Lock helps prevent someone else from reactivating the iPhone; it is not a guarantee that the device will be recovered. Apple explains the feature in its Activation Lock guide.
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- KNOW YOUR SLEEP SCORE—With advanced sleep tracking, Series 11 gives you a daily sleep score. It’s an easy way to help measure and understand the quality of your sleep, so you can make it more restorative.
- GET HYPERTENSION NOTIFICATIONS—Did you know that Series 11 can spot signs of chronic high blood pressure? By analyzing how your blood vessels respond to beats of the heart, it can notify you of possible hypertension.*
- SAFETY FEATURES—A smartwatch that puts your safety first. Series 11 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.* Check In can automatically notify a loved one when you’ve arrived at your destination.
- A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, training load, and Workout Buddy powered by Apple Intelligence from your nearby iPhone*—Series 11 is made to help everyone stay active, from runners and hikers to strength-training enthusiasts.
Beware of “we found your iPhone” scams
Someone claiming to have found the phone may send a convincing text or email. Do not provide your Apple Account password, iPhone passcode, or two-factor authentication code. Do not remove the iPhone from Find My or your Apple Account merely because a message asks you to do so. Lost Mode protects the device, but it cannot prevent phishing attempts against you.
Frequently asked questions
Can I lock an iPhone from Apple Watch without Find My?
No. Find My must have been set up on the iPhone before it went missing. The Apple Watch cannot retroactively enable remote locking.
Does Lost Mode erase the iPhone?
No. Lost Mode locks and protects it. Remote erase is a separate action with more serious consequences.
Can I still call an iPhone in Lost Mode?
Yes. The iPhone can continue to receive phone calls and FaceTime calls, although ordinary notifications and alerts generally remain quiet while it is marked lost.
Can someone bypass Lost Mode by removing the SIM?
Removing the SIM does not turn off Lost Mode or remove Activation Lock. However, it can prevent the phone from receiving commands over that cellular connection, so the request may remain pending until another connection becomes available.
Does Lost Mode permanently cancel my Apple Pay cards?
No. Applicable cards and services are suspended or removed from the missing device. The underlying payment accounts are not cancelled, and some credentials may be restored after Lost Mode is turned off and you sign in again.
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