Software Update Failed Apple Watch Series 3. Keep your iPhone next to your Apple Watch to make sure theyre in range. Users experienced various issues with subsequent OS notably the Apple Watch wont update to watchOS 311 complaint.
3 Pair the iPhone and the watch The iPhone then configures the Apple Watch with the 24GHz Wi-Fi connection and then Apple Watch is able to update itself. WatchOS 7 is the latest and greatest OS version for Apple Watch and it only supports the Apple Watch Series 3 or later versions. I hope this helps someone.
Hopefully this one will actually work.
Does your Apple Watch support watchOS 7. Apple released Watch OS 703 on October 19 2020 which addresses these restart issues on Series 3 watches. Try to install the update again. Remember to turn on Wi-Fi and Bluetooth on your iPhone after you update your Apple Watch.