Apple Watch Problems and Fixes: Pairing, Sync, Battery

Find Your Apple Watch Problem

The table lists 16 Apple Watch symptoms, from connection and charging to passcodes and setup, each with its most likely cause, the first fix from Apple's support pages and the page with the full steps.

Symptom	Most likely cause	First fix	Full steps
Won't connect to iPhone	Out of range, Airplane Mode on, or Wi-Fi and Bluetooth off	Keep your Apple Watch and iPhone close, turn Airplane Mode off and Wi-Fi and Bluetooth on, then restart both.	Apple Watch Not Connecting to Your Phone
Moving to a new iPhone	Watch still paired with the old iPhone	Back up your old iPhone, set up the new one, then open the Apple Watch app with the watch unlocked on your wrist.	How to Pair an Apple Watch With a New iPhone
Pairing for the first time	Watch not paired with any iPhone yet	Turn on the watch, bring it near your unlocked iPhone and tap Continue when the pairing message appears.	How to Pair an Apple Watch With Your iPhone
Want to unpair or hand it on	Selling, giving away or pairing again	In the Apple Watch app, go to My Watch → All Watches, tap the info button, then Unpair Apple Watch.	How to Unpair an Apple Watch From Your iPhone
Not charging	Charger not aligned, the wrong cable, or a dirty watch back	Use the Apple magnetic charging cable, remove any plastic wrap, clean the watch back and charger, then charge for up to 30 minutes.	Apple Watch Not Charging
Red lightning bolt	Battery too low to turn on	Leave it on its Apple magnetic charger for up to 30 minutes; the red bolt means the battery is too low to turn on.	Apple Watch Stuck on the Red Lightning Bolt
Won't turn on	Drained battery	Charge your Apple Watch for up to 30 minutes, then hold the side button and Digital Crown for at least 10 seconds.	Apple Watch Won't Turn On
Won't turn off or frozen	Still on the charger, or a frozen screen	Take it off the charger, then hold the side button, tap the power icon and drag Power Off; if frozen, force restart.	Apple Watch Won't Turn Off
Battery draining fast	Always On and other settings, or a recent update	Turn off Always On, turn on Low Power Mode from Control Center, and keep your Apple Watch near your iPhone.	Apple Watch Battery Draining Fast
Not syncing	Watch disconnected from the iPhone	Check for a green iPhone icon in Control Center, keep your watch near your iPhone, and turn on Fitness Tracking in the Health app.	Apple Watch Not Syncing
No notifications	iPhone unlocked, or the watch locked or disconnected	Lock your iPhone and make sure your Apple Watch is connected and unlocked; then check Focus and the app's notification settings.	Apple Watch Not Getting Notifications
Won't update	Low charge, no Wi-Fi, or the iPhone too far away	Put your Apple Watch on its charger with at least 50% battery, keep your iPhone nearby on Wi-Fi, then try again.	Apple Watch Won't Update
Forgot passcode	Watch disabled after a forgotten passcode or too many wrong tries	Put the watch on its charger, hold the side button, then press and hold the Digital Crown and tap Reset.	How to Reset an Apple Watch Without the Passcode
Asks for someone else's Apple Account	Activation Lock from the previous owner	Ask the Apple Account owner to unpair the watch or remove it at icloud.com/find; if they can't, start an Activation Lock support request with proof of purchase.	How to Remove Activation Lock From an Apple Watch
Need a restart or factory reset	A fault the fixes above didn't clear	Restart first; erase only as the last step.	How to Restart or Factory Reset an Apple Watch
Setting it up	New watch, or one bought from someone else	Pair it with your iPhone first, then follow the setup screens to sign in to your Apple Account and create a passcode.	How to Set Up an Apple Watch Step by Step

Each first fix is the opening step of its linked page.

Apple Watch Won't Connect or Pair

To reconnect an Apple Watch, work through Apple's four steps before you pair it again. Press the side button to open Control Center on the watch: a red iPhone icon or a red X icon means the devices are disconnected, and a green iPhone icon means they're linked again. Bring the watch and iPhone close together. On the iPhone, open Control Center and check that Airplane Mode is off and Wi-Fi and Bluetooth are on; on the watch, check that Airplane Mode is off too. Then restart both devices. Apple puts unpairing and pairing again last, for a watch that still can't connect. Moving to a new iPhone and unpairing before a sale are separate tasks with their own rows above.

Apple Watch Not Charging or Draining Fast

A red lightning bolt means the battery is too low to turn the watch on, and a flat Apple Watch can need up to 30 minutes on its charging cable before it starts. Once the cable is connected, the bolt changes to a red lightning bolt inside a ring. If no lightning bolt appears once the watch is on its cable, reposition the watch, clean its back and the charger, remove any plastic wrap, then try another Apple cable and power adapter. If it still won't charge, force restart it. For a battery that drains fast, Low Power Mode in Control Center turns off the Always On display, and after a watchOS update Apple says to wait a few days, because update tasks keep running in the background. Daily charging habits are in How to Charge an Apple Watch.

How to Restart or Reset an Apple Watch

A restart turns your Apple Watch off and then on again; a reset erases the watch and restores its factory settings. Restart first. A frozen watch may need a force restart instead: hold the side button and the Digital Crown together for at least 10 seconds, until the Apple logo appears. To reset, go to Settings → General → Reset → Erase All Content and Settings on the watch, or unpair it in the Apple Watch app on your iPhone. Only unpairing also removes Activation Lock; an erase on the watch leaves it on. A forgotten passcode and a watch tied to someone else's Apple Account have their own rows in the table. Every button step is in How to Turn Off and Restart an Apple Watch.

Apple Watch Won't Turn On or Off

Apple gives two reasons an Apple Watch won't turn on: it may need to be charged, or it may need a force restart. Charge it first, and if that doesn't work, force restart it. When a watch won't turn off, check the charger first. Apple's user guide notes: "You can't restart your Apple Watch while it's charging." Its turn-off steps start with disconnecting the charger. If you still can't turn the watch off, Apple's next step is a force restart. Apple Watch Won't Turn On and Apple Watch Won't Turn Off, both in the table, hold the full order.

Apple Watch Not Syncing or Getting Notifications

Syncing and notifications both travel between the watch and your iPhone, so start with the connection. Apple says that if you don't get notifications, messages or calls on your Apple Watch, the watch and iPhone might not be connected; the green iPhone icon in Control Center shows they are. Notifications also follow the iPhone's lock state: an iPhone that isn't locked keeps them, and a locked or asleep iPhone passes them to the watch, unless the watch itself is locked. Updates matter too: some iOS updates require a watchOS update so that your data, including Activity data, keeps syncing to the iPhone.

Which Apple Watch Do I Have?

Your Apple Watch model number is in the Apple Watch app on your iPhone:

1. Open the Apple Watch app, tap My Watch, then tap General → About.
2. Tap the Model Number field: the part number that begins with "M" changes to the model number that begins with "A".
3. Find that "A" number in the table below.

Apple also engraves the case size on the back of the watch. To find which Apple Watch series you have from an older model number, or one sold outside North America, use the full list.

Apple Watch Model Identifier Table

The table matches the North American model numbers of 14 Apple Watch models, newest first, to their case sizes and to Apple's watchOS 27 compatibility list.

Model	Case sizes	Model numbers, North America (GPS / GPS + Cellular)	Gets watchOS 27?
Apple Watch Series 12	42 mm, 46 mm	A3581, A3584 / A3582, A3587	Yes
Apple Watch Ultra 4	49 mm	A3579 (GPS + Cellular only)	Yes
Apple Watch Series 11	42 mm, 46 mm	A3331, A3333 / A3335, A3337	Yes
Apple Watch SE 3	40 mm, 44 mm	A3324, A3325 / A3326, A3328	Yes
Apple Watch Ultra 3	49 mm	A3281 (GPS + Cellular only)	Yes
Apple Watch Series 10	42 mm, 46 mm	A2997, A2999 / A3001, A3003	Yes
Apple Watch Ultra 2	49 mm	A2986 (GPS + Cellular only)	Yes
Apple Watch Series 9	41 mm, 45 mm	A2978, A2980 / A2982, A2984	Yes
Apple Watch Ultra	49 mm	A2622 (GPS + Cellular only)	No
Apple Watch Series 8	41 mm, 45 mm	A2770, A2771 / A2772, A2774	No
Apple Watch SE 2	40 mm, 44 mm	A2722, A2723 / A2726, A2727	No
Apple Watch Series 7	41 mm, 45 mm	A2473, A2474 / A2475, A2477	No
Apple Watch Series 6	40 mm, 44 mm	A2291, A2292 / A2293, A2294	No
Apple Watch SE	40 mm, 44 mm	A2351, A2352 / A2353, A2354	No
Series 5 and earlier	38 mm to 44 mm	See the full list	No

"Yes" means Apple lists the model as compatible with watchOS 27: Apple Watch SE 3, Series 9 and later, and Ultra 2 and later. Apple adds that not all watchOS 27 features are available on all devices. Watches sold in other regions, such as China mainland, carry different model numbers.

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watchOS Updates and Known Issues

A fault that starts the day an update installs can be a known issue rather than a setting, so check the update before you reset anything.

Did a watchOS Update Cause It?

If your Apple Watch suddenly misbehaves after an update, compare your version with the current one on watchOS versions on Apple Watch, where we list known issues by version. Apple's update page asks you to update the iPhone to the latest iOS, charge the watch to at least 50 percent, connect the iPhone to Wi-Fi and keep it near the watch, and leave the watch on its charger until the update completes. The watch then restarts on its own. How to Update Apple Watch covers both update methods, Apple Watch won't update covers an install that stalls, and the Wearable and Earbud Update Tracker lists issues across brands. Get an email when a watchOS update breaks something, and when it's fixed.

Set Up, Care and Find

Three Apple Watch jobs are tasks rather than faults, and each has its own guide:

• Apple Watch face won't change: picking, editing and switching watch faces.
• How to Change an Apple Watch Band: taking a band off and fitting a new one.
• How to Find a Lost Apple Watch: locating a watch you've misplaced.

When to Contact Apple Support

Contact Apple Support when the first fix and its linked page haven't solved the problem, in this order:

1. Try the next fix on the linked page for your symptom.
2. Reset the watch with How to Restart or Factory Reset an Apple Watch; you'll pair it again afterwards.
3. Contact Apple Support: get service with your model number ready.
4. Check repair options: Apple Watch battery replacement options for the battery, or repair an Apple Watch screen for the display.

If Battery Health on the watch shows the message Battery Needs Service, Apple says to contact Apple Support. AppleCare+ plans are explained in What Is AppleCare+ for AirPods and Apple Watch.