The A370 mobile setup fails, now what?

Make sure location is enabled for Polar Flow app in the phone's application settings. On Android 6 and newer devices, location permission is needed to scan for Bluetooth devices.

If you have several Flow app compatible Polar devices in use, make sure you have chosen A370 as the active device in the Android Flow app. This way Flow app knows to connect to your watch. In the Flow app, go to Devices and choose A370, and then return to the main menu.


  • If your A370 displays Pairing failed during the setup and Flow app says Connection lost, remove the Bluetooth pairing from your mobile device settings and Reset Bluetooth connections from your A370. This is done from the Settings menu, tap the Bluetooth icon. Pair the devices again. 
  • If you’ve disabled Bluetooth in the middle of the first setup, close the Update failed message and sign out of Flow app, or force quit the app, and start again.
  • If you change your mind and cancel the setup, you need to start the setup again from Flow app by going to Support Get started with new device or do the setup with USB cable and a computer using Polar FlowSync.
  • If you experience unexpected behavior in Flow app during setup, first force quit it to see if this helps. If not, uninstall and reinstall the app. Reset your A370 if nothing else works.

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