Apple Watch Ultra

If your Apple Watch freezes, it may help restarting it.

Solution: Restart your Apple Watch

Press and hold the Digital Crown.

At the same time, press and hold the Side button until your Apple Watch is restarted.

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If the surrounding temperature is too high or too low, it may cause your Apple Watch to not respond or shut down.

Solution: Try using your Apple Watch again when you're in an area where the temperature of your surroundings is within the calculated operating temperature of your Apple Watch. See the recommended operating temperature for your Apple Watch on the Apple web page.