Software Update Failed On Iwatch. On your Apple Watch open the Settings app then tap General Software Update. Finally you have reset Apple Watch to factory settings.
When the update is stuck and wont start you will need to delete the update from your iPhone. Finally you have reset Apple Watch to factory settings. On your iPhone tap on Settings General Software Updates and update to the latest iOS Next on your watch Go to Settings General Reset Erase all content and settings On your iPhone open the Apple Watch app tap the My Watch tab then tap your watch at the top of the screen.
After pairing your Apple Watch to your iPhone again try updating watchOS by going to General - Software Update in your iPhones Watch app.
To resolve this error do the following. The first step is to make sure that you connect your Charger with iPhone and Apple Watch. Remember to turn on Wi-Fi and Bluetooth on your iPhone after you update your Apple Watch. On your Apple Watch open the Settings app then tap General Software Update.