You glance at your Galaxy Watch7 expecting today's step count, last night's sleep, or that text you just got, and nothing lines up with what's on your phone. The wrist and the phone are clearly drifting apart, and a 44mm Bluetooth Watch7 (model SM-L310) leans entirely on that link to stay useful. The good news is that almost every sync problem on this model traces back to the Bluetooth connection or the Galaxy Wearable app, and both are fixable from the devices already in your hands.
Before you start, one detail matters for this exact model. The Galaxy Watch7 runs Wear OS Powered by Samsung and pairs only with an Android phone running Android 11 or later through the Galaxy Wearable app. It is not compatible with iPhone or iOS, so the separate "Samsung Galaxy Watch" app in the App Store will not help here; that app only covers older Samsung models. Work the fixes below in order, easiest and safest first, and save the reset for last.
Start With the Galaxy Wearable App's Connection Status
Your Watch7 only syncs while it is actually connected to your phone over Bluetooth through the Galaxy Wearable app, so that connection is the first thing to confirm. Open the Galaxy Wearable app on your phone and read what it shows you at the top.
Open the Galaxy Wearable app on your Android phone.
If the app displays "Start," your watch and phone are not connected. Tap Start, select your watch, and follow the on-screen instructions to connect.
If the app shows a disconnected status instead, leave it open and move on to the Bluetooth checks below.
Reconnecting here resolves a surprising number of "not syncing" complaints, because the app silently drops the link more often than people expect. If it reconnects and your data catches up, you are done.
Confirm Bluetooth Is On and the Watch Is Close Enough
Syncing rides entirely on Bluetooth for the 44mm Bluetooth model, which has no LTE or cellular fallback. If Bluetooth is off on either device, or the watch has simply wandered too far, the connection cannot hold.
On the watch, swipe down from the top to Quick settings, or go to Settings > Connections > Bluetooth, and make sure the Bluetooth switch is on.
Then check the phone too, under Settings > Connections > Bluetooth.
Keep the watch and phone within Bluetooth range, about 30 feet, for a stable connection; walls and distance are common culprits when sync works in one room and stops in another.
Clear Airplane Mode and Watch Only Mode
A single connectivity mode left on can quietly block everything. Airplane mode shuts down Bluetooth, and Watch only mode deliberately cuts the phone connection to save battery, so both have to be off for syncing to work.
On the phone, go to Settings > Connections > Airplane mode and verify the switch is off.
On the watch, swipe down to Quick settings and tap the Airplane mode icon to turn it off.
While you are in Quick settings, turn off Watch only mode as well, since it restricts the very features your watch needs to sync.
Restart Both Devices, Then Force Restart the Watch
A plain restart clears the temporary glitches that stall a Bluetooth handshake, so restart the phone and the watch first and see whether they reconnect on their own. If the watch is frozen or still refuses to connect, a force restart is the next move.
Press and hold the Home button and the Back button at the same time for at least seven seconds.
The screen turns black and the Samsung logo appears, indicating the watch is restarting.
Release both buttons once you see the logo.
The Home button may also be labeled as the Power button on your watch, so use that combination if the button names differ. A force restart does not erase anything; it simply reboots the watch when a normal restart will not.
Top Up the Battery and Turn Off Power Saving
Low battery and aggressive power management both interfere with the background transfers that keep your devices in sync. Charge both the phone and the watch before troubleshooting so a drained battery is not the reason transfers stall.
Then turn off Power saving mode, which can block syncing on either device.
On the phone, open Settings and search for Power saving, then switch it off.
On the watch, swipe down to Quick settings and turn off Power saving there.
With both devices charged and unrestricted, the connection has the headroom it needs.
Update the Galaxy Wearable App and the Watch Software
An out-of-date companion app or stale watch software can break compatibility between the two, so bring both current. Updating is one of the most reliable fixes for sync issues that appeared out of nowhere.
First, update the app by opening the Play Store, searching for "Galaxy Wearable," and tapping UPDATE.
Next, update the watch from the app by going to Galaxy Wearable > Watch settings > Watch software update > Download and install; the watch needs at least a 30% charge for the update to run, and you can optionally turn on "Auto download over Wi-Fi."
You can also update directly from the watch via Settings > General > Watch software update.
Force a Manual Samsung Health Sync
Sometimes the watch is connected fine, but your health data simply will not appear on the phone. That is a Samsung Health sync problem rather than a Bluetooth one, and you can push the data through manually.
Open Samsung Health on the phone.
Tap More options (the three dots), then Settings.
Tap Sync with Samsung Cloud and turn the switch on.
Tap Sync now.
For this to work, make sure Power saving, Airplane mode, and Watch only mode are all off, since each of these restricts the features required to sync data. If only your steps, sleep, or workouts were missing, this usually fills the gap.
Unpair and Re-Pair the Watch
If the watch still will not sync after the steps above, a fresh pairing rebuilds the connection from scratch without erasing anything on the watch. Unpairing here only removes the Bluetooth link, not your data.
On the phone, go to Settings > Connections > Bluetooth, tap the Settings icon next to your watch, and choose Unpair.
Then open the Galaxy Wearable app and follow the on-screen pairing steps to reconnect.
A clean re-pair often resolves stubborn syncing that survives every lighter fix.
Reset the Watch as a Last Resort
A reset is the final option because it erases the watch, so treat it as a last resort. Before you reset, back up your data first, because the reset wipes the watch clean and you will want that data restored afterward.
- 1.Unpair the watch from the phone's Bluetooth settings (Settings > Connections > Bluetooth, tap the Settings icon next to your watch, then Unpair).
- 2.On the watch, go to Settings > General > Reset > Reset and follow the on-screen instructions. You can also reset through the app via Galaxy Wearable > Watch settings > General > Reset > Reset to confirm.
- 3.After the reset, sign in to the same Samsung account that was on the watch, then reconnect through the Galaxy Wearable app.
Signing back into the same Samsung account is what brings your settings and backed-up data home. If the watch still will not connect or sync after a reset and fresh pairing, contact Samsung Support through Samsung Members or the Samsung Support Center for service.
Frequently Asked Questions
Can I sync my Galaxy Watch7 with an iPhone?
No. The Galaxy Watch7 runs Wear OS Powered by Samsung and requires an Android phone running Android 11 or later, paired through the Galaxy Wearable app. It is not compatible with iPhone or iOS, and the separate "Samsung Galaxy Watch" app in the App Store does not support this model.
How close does my watch need to be to my phone to stay synced?
Keep the watch and phone within Bluetooth range, about 30 feet, for a stable connection. The 44mm Bluetooth model has no cellular fallback, so once you move out of Bluetooth range, syncing stops until you come back within range.
Why is my health data missing even though the watch is connected?
That points to a Samsung Health sync issue rather than a Bluetooth one. Open Samsung Health on the phone, tap More options (three dots) > Settings > Sync with Samsung Cloud, turn the switch on, then tap Sync now, and make sure Power saving, Airplane mode, and Watch only mode are all off.
Will a force restart erase my watch data?
No. A force restart, holding the Home button and the Back button together for at least seven seconds until the Samsung logo appears, simply reboots the watch. Only a reset (Settings > General > Reset > Reset) erases the watch, which is why you should back up your data before doing one.
What battery level do I need before updating the watch software?
The watch needs at least a 30% charge to download and install a software update. It is also a good idea to charge both the phone and the watch before any sync troubleshooting so a low battery is not part of the problem.