I have given my daughter a Apple Watch as a present and have been a great fan Apple products and the Apple Watch is one of her favorites the series 3 and it’s not working and I’ve never used it and I heard a serial number would help
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Apple Watch
“Not working” covers a lot of ground. Could you describe what is happening, or not happening?
If the Watch is old and has not been charged for a long while, it might need its battery replaced.
Click ▶︎ Restart your Apple Watch.
Need more help?
On Apple Watch Series 1 or later—including Apple Watch Hermès, Apple Watch Nike, and Apple Watch SE—remove the band from your watch, then check the band slot.
How to find the serial number or IMEI for your Apple Watch - Apple Support
It's also on the box;
Apple Watch Series 3 not working
