watchOS 5.3.10 (16U711) for Apple Watch Series 1 (38mm) ✓ This OTA is signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
potential future use. They might also be useful if you're doing research.
Release Date March 24, 2026 Upload Date March 16, 2026 Filename 1d1b871be086e26412040296045e4dab1fab16bf.zip Filesize 1.3 GiB Identifier Watch2,6
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