Quick Fix: The most common cause of a smartwatch not syncing is Bluetooth being interrupted by a phone OS update or a background app restriction. Restart both your phone and smartwatch, then toggle Bluetooth off and back on in your phone's full Settings — not just the quick panel — to force a fresh connection.
Why This Happens
Smartwatch syncing issues in 2026 are most frequently caused by three things: an outdated companion app that lost compatibility after a phone software update, aggressive battery optimisation on popular Indian Android brands like Xiaomi, Realme, OPPO, and Vivo that kills the app in the background, or corrupted Bluetooth pairing data that needs to be cleared and redone. Less commonly, a firmware bug on the watch itself can cause the device to appear connected while refusing to pass data to the app. Understanding the root cause helps you pick the right fix and resolve the problem in minutes rather than hours.
Step-by-Step Fix
- Restart Both Devices — Power off your smartwatch by pressing and holding the side button for 5–8 seconds and selecting 'Power Off' from the menu. Restart your smartphone as well. Once both devices have fully booted up, open the companion app and wait 60 seconds to see if they reconnect and sync automatically. This single step resolves the majority of temporary Bluetooth glitches.
- Toggle Bluetooth Off and On — Go to your phone's Settings > Bluetooth (not just the quick-access toggle in the notification shade) and switch Bluetooth off. Wait a full 10 seconds, then turn it back on. Opening the full settings page forces a proper Bluetooth stack reset, which clears stale connection states that a quick-toggle often misses.
- Forget and Re-Pair the Smartwatch — In your phone's Bluetooth settings, locate your smartwatch in the list of paired devices, tap the settings or info icon next to it, and choose 'Forget This Device'. On the watch, navigate to Settings > Bluetooth or Settings > Connection > Disconnect Phone. Then open the companion app, tap 'Add Device' or 'Pair New Device', and follow the on-screen pairing instructions from the beginning.
- Update the Companion App and Watch Firmware — Open the Google Play Store or Apple App Store, search for your watch's companion app, and install any available update. Then open the app, go to Device Settings or My Devices, and look for a 'Firmware Update' or 'Software Update' option. Install any pending update on the watch. Phone OS updates frequently break compatibility with older app and firmware versions, and updating both fixes this instantly.
- Check and Enable App Permissions — Navigate to Settings > Apps > [Your Companion App Name] > Permissions on your phone. Ensure that Location (required for Bluetooth scanning on Android), Contacts, Phone, Notifications, and on Android 12 or later, 'Nearby Devices' permissions are all set to 'Allow'. Denying even one of these silently prevents the app from communicating with the watch, and the app typically shows no error message to tell you this.
- Disable Battery Optimisation for the Companion App — This is the most overlooked fix for Indian Android phone users. Go to Settings > Battery > Battery Optimisation or App Management, find the companion app, and set it to 'No Restrictions', 'Don't Optimise', or 'Allow Background Activity' depending on your phone brand. On Xiaomi and Redmi phones, also go to Security > Boost Speed and remove the app from the auto-clear list. This prevents the phone from force-stopping the sync process.
- Clear App Cache and Data — On Android, go to Settings > Apps > [Companion App] > Storage > Clear Cache, then tap Clear Data. Note that clearing data will log you out and remove local app settings, so you will need to sign in again and re-pair. On iPhone, delete and reinstall the app from the App Store to achieve the same effect. This removes corrupted files that block syncing even when Bluetooth shows as connected.
- Reinstall the Companion App — If none of the above steps have worked, completely uninstall the companion app, restart your phone, and download a fresh copy from the official app store. Sign in with your account, grant all requested permissions during the setup flow, disable battery optimisation immediately, and pair your watch again from scratch. A clean installation eliminates any app-level software corruption that persists through cache clearing.
Still Not Working? Advanced Fixes
If the standard steps above have not resolved the issue, try these deeper troubleshooting methods:
- Factory Reset the Smartwatch — On the watch, go to Settings > System > Factory Reset or Settings > General > Reset. This wipes the watch back to its original state and is often the only fix for persistent firmware-related sync failures. After the reset, re-pair with the companion app as a new device. Remember that locally stored health data that was not synced may be lost.
- Test With a Different Smartphone — Borrow a friend's or family member's phone and try pairing your smartwatch with it using the same companion app. If the watch syncs successfully on a different phone, the problem is specific to your phone's settings, Bluetooth hardware, or OS version rather than the watch itself. This helps you isolate where the fault lies before calling support.
- Check for Conflicting Bluetooth Connections — Some smartwatches can only maintain an active connection with one device at a time. If your watch was previously paired with a tablet, old phone, or another device, it may be trying to connect to that device instead of your current phone. Go into the watch's Bluetooth settings and remove all previously paired devices, leaving only your current phone.
- Reinstall on a Different User Account or Profile — On Android, if your phone has multiple user profiles or a work profile enabled, the companion app may be restricted from running in the background due to profile-level security policies. Switch to the primary personal profile and reinstall the app there. Also check that no parental control or MDM (Mobile Device Management) app is blocking Bluetooth access for the companion app.
When to Contact Support
If your smartwatch still does not sync after completing all the steps above including a factory reset, there may be a hardware fault with the Bluetooth chip, internal memory, or firmware that cannot be resolved at home. Clear signs of a hardware issue include: the watch not appearing in Bluetooth scans at all even after restarting, the watch screen freezing or showing garbled data, physical damage around the charging port or body, or the watch heating up unusually during charging. These symptoms suggest an internal fault that requires professional inspection. iTechArena offers a 7-day return policy on all genuine smartwatch purchases, and our products come with full manufacturer warranty so you are protected. If you are experiencing any of these issues with a watch purchased from us, reach out immediately on WhatsApp at +91 9023252627 or visit us in person at SCO-1072-73, Sector 22B, Chandigarh. You can also browse our full range of genuine smartwatches with warranty at itecharena.com. We stock only authentic products and our team is available to help you get your device working or process a replacement quickly.
Frequently Asked Questions
Why is my smartwatch showing connected on Bluetooth but not syncing data to the app?
This usually happens due to missing app permissions, especially Location or Nearby Devices on Android. Go to Settings > Apps > [Companion App] > Permissions and enable all permissions. Also check that battery optimisation is disabled for the app, as aggressive battery-saving modes on Indian Android phones frequently block background data sync even when Bluetooth shows as connected.
My smartwatch was syncing fine and suddenly stopped after my phone updated. What happened?
A phone OS update can reset Bluetooth permissions and break compatibility with older companion app versions. Update your companion app from the Play Store or App Store immediately after a phone update. If the app has not yet been updated for the new OS version, you may need to wait a day or two for the app developer to release a compatible patch, as this is a very common occurrence after major Android and iOS updates.
How do I fix a smartwatch that keeps disconnecting from my phone every few minutes?
Frequent disconnections are almost always caused by battery optimisation killing the companion app in the background. Go to your phone's battery settings and whitelist the companion app so it is never restricted or closed automatically. Also ensure your phone and watch are within 10 metres of each other and there are no large metal objects or thick walls between them, as weak Bluetooth signal causes repeated disconnections.
Will I lose my health data if I unpair and re-pair my smartwatch?
Data already synced and saved inside the companion app or its linked cloud account will remain intact after unpairing. However, any health data stored only on the watch that has not yet synced to the app may be lost if you perform a factory reset. It is good practice to attempt a sync before unpairing; if the watch is completely unresponsive, some recent local data such as today's step count or sleep records may not be recoverable.
Can using a fake or third-party charging cable cause smartwatch syncing issues?
Yes, non-genuine charging accessories can cause incomplete charging or even minor firmware corruption, which indirectly leads to sync failures and erratic Bluetooth behaviour. Always use the original magnetic charger that came in the box with your smartwatch. iTechArena sells only genuine smartwatches with original in-box accessories and full manufacturer warranty, ensuring you are covered from the day of purchase and never stuck with counterfeit parts that damage your device.