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Anyone know what this is for? Looks like a tiny SIM card slot… it's a series 4 model : r/AppleWatch
2023 New Phone Watch SIM Card 4g Smart Watch Boy Girl Photo Wifi Positioning Child Watch
How To Remove SIM Card from Smartwatch - YouTube
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Right side hole - Apple Community
How does the Apple Watch eSIM work? - YouTube
Usa la funzionalità dual SIM - Supporto Apple (IT)