watchOS 5.3 (16U5526f) 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 May 15, 2019 Upload Date May 13, 2019 Filename ecf546eaa45ae8c6f525200716394f414049deaa.zip Filesize 1.3 GiB Identifier Watch3,1
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