Update Apple Watch using iPhone
Your watch needs to be charged at least 50%, and should stay on the charger until the update is complete
It's important to keep your iPhone and watch next to each other untill the watchOS update is finished
Open the Apple Watch app on iPhone
Tap General and then tap Software Update
You might be asked to unlock your watch
Next, tap download and install
This button might read as install if your device has already downloaded the update
You might be asked to enter your iPhone passcode
Your iPhone will then download the update to your watch
Once the update starts, a progress wheel will appear on your Apple Watch
When the update is finished your watch will restart
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