Smartwatch not connecting to phone: how to fix it

A smartwatch that will not connect to your phone usually has one of four causes: Bluetooth or range problems, a stale pairing record, a companion app that cannot run in the background, or software that is out of step between the two devices. Work through the checks below in order, because the simplest fixes come first. A factory reset should be the last step, not the first.

Start with the basic checks

Most connection failures come from one of these, so check them on both devices before anything else.

• Bluetooth is on, and airplane mode is off. On many watches, airplane mode also turns off Bluetooth, so check it on the watch as well as the phone.
• The devices are close together. Bluetooth reaches only a limited distance, and walls, metal and a bag between the devices reduce it further. Keep them within arm's reach during setup.
• Both devices have enough charge. A low battery can make a watch drop its connection or refuse to pair. If the battery drains too fast in general, battery life tips cover the usual causes.
• The phone supports the watch's software. An old phone may not run the latest watch system, and some watches work with only one phone platform. Check the manufacturer's compatibility list.

If a check turns up a problem, fix it and wait a minute before testing again.

Restart both devices, then pair again

Restart the phone and the watch. A restart clears temporary Bluetooth states that can block a new connection. If the watch still does not connect, the old pairing is the next suspect.

Remove the old pairing on both sides

A stale pairing record on one side can stop a fresh connection, even when the other side has forgotten the watch. Remove the watch from the phone's Bluetooth list, and remove the pairing in the watch's own settings or in the companion app. Removing it from only one side often leaves the other side trying to reconnect with outdated pairing details.

Set the watch up as a new device

Open the companion app and start the setup from the beginning instead of trying to resume an old session. Keep both devices close, and follow the prompts. Some setups ask you to confirm a code shown on both screens. A fresh setup usually takes a few minutes.

Check the companion app and its permissions

Most smartwatches depend on an app running on the phone. If that app is blocked, the watch stays disconnected even when Bluetooth looks fine.

• Give the app Bluetooth access. On Android, depending on the version, the app may also need the nearby devices permission or the location permission, because scanning for Bluetooth devices requires one of them. On an iPhone, check the Bluetooth permission in the Settings app.
• Exclude the app from battery optimization. Android can stop apps in the background to save power, and that cuts the link to the watch. Find the app's battery setting and set it to unrestricted, if your phone offers that option.
• Allow notifications if you want alerts on the watch. Without this permission the watch may stay connected but show no messages.

Know the platform rules

The steps differ by ecosystem, so start with the system your watch belongs to.

• Apple Watch needs an iPhone. It does not pair with an Android phone, and pairing and most settings run through the Watch app on the iPhone.
• Wear OS watches pair through the Wear OS app on Android. Some also work with an iPhone, but with fewer features, so check the watch's compatibility list before troubleshooting.
• Garmin and Fitbit watches use their own apps, Garmin Connect and the Fitbit app. If the watch does not sync, open that app first and check its device list and sync status.

Watches from other brands follow the same pattern. The manual or support page names the phone app the watch needs, and that app is the first place to look.

Keep the software up to date

A mismatch between the watch's software and the phone app can break pairing, especially when one side updates and the other does not. Update the watch and the companion app, then restart both devices. On an Apple Watch the system software is watchOS, and it is updated from the Watch app on the iPhone; see watchOS for more. Start an update with the watch charged and close to the phone, because an interrupted update can leave the watch needing a restore.

When to reset, and what you lose

A factory reset clears the watch and its pairing. Use it only when the steps above have failed, because it takes time and removes data that exists only on the watch.

Before you reset, sync the watch. Health and activity data that has already reached the phone or the vendor's cloud stays available. Anything stored only on the watch is lost, such as unsynced workouts, downloaded music and settings you have made on the watch itself.

1. Sync the watch so that recent data reaches the phone.
2. Reset the watch from its own settings menu.
3. Remove the watch from the phone's Bluetooth list and from the companion app.
4. Set the watch up again as a new device, following the setup steps above.

Symptom, likely cause and fix

Match what you see with the most likely cause. The table covers the cases that come up most often.

FAQ

Why does my watch connect and then disconnect?

A weak signal, a restricted companion app and a low battery are the usual causes. Move the devices closer, check the app's background permissions, and charge the watch. If it keeps dropping in one particular place, the signal there is probably the problem, so test the same setup somewhere else.

Can one watch pair with an Android phone and an iPhone?

Not at the same time. A watch pairs with one phone, so you need to remove the pairing before you move the watch to another phone. Apple Watch works only with an iPhone, and Wear OS watches vary by model.

Will I lose my data if I unpair the watch?

Data that has already synced to the phone or the vendor's cloud is kept. Data that exists only on the watch may be erased when you unpair or reset it, so sync first.

Is a fitness tracker easier to connect than a smartwatch?

Often, yes. A fitness tracker usually has fewer features and simpler software, so there is less that can fail between the device and the phone. The pairing steps are similar, though, and the checks in this guide apply to both. See smartwatch and fitness tracker differences for a fuller comparison.