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How to Fix Phone Link When It Won’t Connect or Sync on Windows

Find the right fix for Phone Link problems on Windows, from Android Wi-Fi and background permissions to iPhone Bluetooth pairing and missing notifications.
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Start by identifying what stopped working: pairing, the connection, one feature, or notifications. Android Phone Link problems most often call for checking Wi-Fi, account sign-in, and background permissions; iPhone pairing and syncing rely on Bluetooth and the permissions you grant. Work through the matching steps below before unlinking or resetting the connection.

Check compatibility and identify the symptom

Microsoft lists Windows 10 and Windows 11 PCs, Android 10 or later, and iOS 16 or later among Phone Link requirements. Android features vary by phone model and operating-system version. iPhone use requires a PC with Bluetooth Low Energy support. See Microsoft’s Phone Link requirements and setup for current details.

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First decide which problem you have: Phone Link cannot pair, a paired phone appears disconnected, messages or photos are stale, notifications are missing, or only one feature has stopped working. A single feature may be unavailable on a particular device or OS version even when the rest of Phone Link works.

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If Phone Link will not connect or sync with Android

Check Wi-Fi and account sign-in

  1. Put both devices on the same Wi-Fi network. Keep the PC and phone turned on and online, and compare the network names shown on each. If a router broadcasts separate 2.4 GHz and 5 GHz network names, the devices may have joined different networks. Microsoft’s connection guidance says to keep both devices nearby, on, and on the same Wi-Fi network. See Troubleshoot Apps in the Phone Link.
  2. Confirm the same Microsoft account is in use. Check the account in Phone Link on the PC and Link to Windows on the phone. Also verify that the PC has internet access. If Windows reports an account issue under Shared experiences, use Fix now and follow its prompts. More connection checks are in Microsoft’s Phone Link troubleshooting guide.
  3. Test on a trusted network if restrictions may be involved. VPNs, firewalls, public Wi-Fi, and workplace network rules can interfere with communication between devices. If you are on a managed work network, ask its IT administrator before changing security settings.

Allow the apps to run in the background

  • Temporarily turn off battery saver on both devices while troubleshooting.
  • On Android, check whether battery optimization is restricting Link to Windows. Microsoft recommends excluding the app from optimization on affected devices.
  • Check Windows background-app permissions and Android notification permission if syncing or alerts are affected.
  • Make sure Do Not Disturb or a Windows focus setting is not suppressing alerts you expect to see.

When you have checked the applicable settings, update Phone Link on the PC and Link to Windows on the phone, then reopen both apps. Microsoft’s app troubleshooting steps are at Troubleshooting the Phone Link.

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If Android notifications are missing

Notification syncing can fail even when other Phone Link features work. On the Android phone, open Settings and find Notification access (the exact menu name can differ by device). Turn Link to Windows access off and on, accept the permission prompt, then open the Notifications section in Phone Link and allow it to refresh. Also check the phone’s battery-saver and Link to Windows battery-optimization settings.

There is one restriction a permission change cannot fix: Microsoft says Android 15 or later may mark some notifications as sensitive, and those notifications are blocked from appearing in Phone Link. Check their contents directly on the phone. See Microsoft’s notification troubleshooting guidance.

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If iPhone pairing or syncing fails

Phone Link pairs with iPhone over Bluetooth. Turn Bluetooth on on both devices, keep them nearby, and grant the requested permissions for notifications, contacts, messages, or other data you want to sync. The Link to Windows app is optional for iPhone setup; the permissions you grant determine which information Phone Link can access.

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If QR-code pairing does not complete, clear the old Bluetooth pairing on both devices before trying again:

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  1. In Windows Bluetooth settings, remove the iPhone.
  2. In the iPhone’s Bluetooth settings, forget the PC.
  3. Turn Bluetooth off on both devices for 10 seconds, then turn it back on.
  4. Retry pairing in Phone Link and approve the requested permissions.

If you had already removed the iPhone from Windows Bluetooth settings, Microsoft advises forgetting the PC on the iPhone before starting Phone Link pairing again. Removing the iPhone from Windows Bluetooth settings stops syncing calls, messages, and notifications until you pair again. See Phone Link requirements and setup.

If setup fails after scanning the QR code

If Phone Link reports that setup codes do not match, close and reopen Phone Link on the PC and start setup again. Microsoft says more than three failed attempts to match setup codes can temporarily block linking for security reasons. Avoid repeatedly entering codes during that block; follow Microsoft’s Phone Link setup troubleshooting instead.

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When to reset or unlink the connection

Resetting is a later step, not a first check: it clears the existing connection state, so you will need to set up the devices again. If Android still will not connect after you have checked Wi-Fi, accounts, permissions, battery restrictions, and app updates, use Microsoft’s instructions for resetting your Android device and PC with Phone Link. Unlinking is also appropriate when you need to rebuild the connection, but expect to pair and configure it again.

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