watchOS 4.3.1 (15T5545b) for Apple Watch Series 3 (38mm, LTE) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date April 16, 2018 Upload Date April 12, 2018 Filename 15842e265c4f33359937eddf3a359beb464d8110.zip Filesize 1.2 GiB Identifier Watch3,1
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