1. The iwatch battery is low, please try charging the device.
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2. The iwatch phone is broken, just change the battery.
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3. There is a problem with the iwatch device system. Try to update the device system.
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4. If the iwatch is faulty, forcibly restart the iwatch.
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The above answers hope to help a lot of friends, thank you for your support and encouragement, thank you for your recognition