Does Apple Watch Series 9 work with iPhone 12?
Quick compatibility check between Apple Watch Series 9 and iPhone 12.
Confirmed compatible
Apple Watch Series 9 pairs fully with iPhone 12 running iOS 17.
High confidence · Updated February 2026
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iPhone 12 + iOS 17 →
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0 works
0 does not work
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Works
Yes
Confidence
High
Known issues
None
Workaround
Not needed
What works & limitations
- All health features
- Fitness tracking
- Notifications
- Apple Pay
- Siri
View Apple Watch Series 9 on Amazon → (affiliate link)
Data & storage
Offline play
No — internet required
Results are based on publicly available data and aggregated user reports.
Result not what you expected? Try using exact model and version names for better accuracy.
Results are based on publicly available compatibility information and community feedback.