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Zeus

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Version 3.1.4 · iOS 17 or later

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© 2026 Zeus. All rights reserved.

Not affiliated with Apple Inc. iPhone and iPad are trademarks of Apple Inc.

  1. IPSW
  2. Apple Watch
  3. Apple Watch Series 3 (38mm)

Apple Watch Series 3 (38mm) firmware downloads

Model Watch3,3 · Board N121sAP · 126 versions

Signed now

Apple is signing these versions, so they install with a normal restore.

47 more signed files below.

  • watchOS 6.3.1Latest

    Build 17U224 · Feb 2, 2026 · 1.38 GB

    Download

  • watchOS 5.3.10

    Build 16U711 · Mar 24, 2026 · 1.28 GB

    Download

  • watchOS 5.3.9

    Build 16U693 · Nov 5, 2020 · 1.28 GB

    Download

Restoring wipes all data. Back up your device first. How to restore

All firmware

126 versions

Newest first, every release Apple has published for this model.

  • watchOS 6426
  • watchOS 51097
  • watchOS 4461

watchOS 6

426 files
watchOS 6 firmware for Apple Watch Series 3 (38mm)
VersionBuildReleasedSizeStatusDownload
watchOS 6.3.1Signed

Update from watchOS 6.3

17U224 · Feb 2, 2026 · 180 MB

17U224Feb 2, 2026180 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.5

17U224 · Feb 2, 2026 · 273 MB

17U224Feb 2, 2026273 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.6

17U224 · Feb 2, 2026 · 273 MB

17U224Feb 2, 2026273 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.8

17U224 · Feb 2, 2026 · 203 MB

17U224Feb 2, 2026203 MBSignedDownload
watchOS 6.3.1LatestSigned

17U224 · Feb 2, 2026 · 1.38 GB

17U224Feb 2, 20261.38 GBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.0

17U224 · Feb 2, 2026 · 698 MB

17U224Feb 2, 2026698 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.0.1

17U224 · Feb 2, 2026 · 698 MB

17U224Feb 2, 2026698 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.2

17U224 · Feb 2, 2026 · 569 MB

17U224Feb 2, 2026569 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.3

17U224 · Feb 2, 2026 · 569 MB

17U224Feb 2, 2026569 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.1

17U224 · Feb 2, 2026 · 572 MB

17U224Feb 2, 2026572 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1

17U224 · Feb 2, 2026 · 582 MB

17U224Feb 2, 2026582 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2

17U224 · Feb 2, 2026 · 323 MB

17U224Feb 2, 2026323 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.1

17U224 · Feb 2, 2026 · 323 MB

17U224Feb 2, 2026323 MBSignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.0

17U216 · Jan 26, 2021 · 601 MB

17U216Jan 26, 2021601 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.0.1

17U216 · Jan 26, 2021 · 601 MB

17U216Jan 26, 2021601 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.2

17U216 · Jan 26, 2021 · 469 MB

17U216Jan 26, 2021469 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.1

17U216 · Jan 26, 2021 · 192 MB

17U216Jan 26, 2021192 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1

17U216 · Jan 26, 2021 · 482 MB

17U216Jan 26, 2021482 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2

17U216 · Jan 26, 2021 · 191 MB

17U216Jan 26, 2021191 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.3

17U216 · Jan 26, 2021 · 469 MB

17U216Jan 26, 2021469 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.1

17U216 · Jan 26, 2021 · 471 MB

17U216Jan 26, 2021471 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.8

17U216 · Jan 26, 2021 · 80 MB

17U216Jan 26, 202180 MBUnsignedDownload
watchOS 6.3Unsigned

17U216 · Jan 26, 2021 · 1.38 GB

17U216Jan 26, 20211.38 GBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.6

17U216 · Jan 26, 2021 · 143 MB

17U216Jan 26, 2021143 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.5

17U216 · Jan 26, 2021 · 143 MB

17U216Jan 26, 2021143 MBUnsignedDownload

watchOS 5

1097 files
watchOS 5 firmware for Apple Watch Series 3 (38mm)
VersionBuildReleasedSizeStatusDownload
watchOS 5.3.10Signed

16U711 · Mar 24, 2026 · 1.28 GB

16U711Mar 24, 20261.28 GBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.9

16U711 · Mar 24, 2026 · 73 MB

16U711Mar 24, 202673 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.4

16U711 · Mar 24, 2026 · 77 MB

16U711Mar 24, 202677 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.1

16U711 · Mar 24, 2026 · 496 MB

16U711Mar 24, 2026496 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.5

16U711 · Mar 24, 2026 · 77 MB

16U711Mar 24, 202677 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.6

16U711 · Mar 24, 2026 · 77 MB

16U711Mar 24, 202677 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.8

16U711 · Mar 24, 2026 · 75 MB

16U711Mar 24, 202675 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.7

16U711 · Mar 24, 2026 · 75 MB

16U711Mar 24, 202675 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.2

16U711 · Mar 24, 2026 · 80 MB

16U711Mar 24, 202680 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.3

16U711 · Mar 24, 2026 · 77 MB

16U711Mar 24, 202677 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1

16U711 · Mar 24, 2026 · 496 MB

16U711Mar 24, 2026496 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.2

16U711 · Mar 24, 2026 · 481 MB

16U711Mar 24, 2026481 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.1

16U711 · Mar 24, 2026 · 82 MB

16U711Mar 24, 202682 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.0.1

16U711 · Mar 24, 2026 · 512 MB

16U711Mar 24, 2026512 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.3

16U711 · Mar 24, 2026 · 481 MB

16U711Mar 24, 2026481 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.0

16U711 · Mar 24, 2026 · 512 MB

16U711Mar 24, 2026512 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3

16U711 · Mar 24, 2026 · 87 MB

16U711Mar 24, 202687 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.2

16U711 · Mar 24, 2026 · 164 MB

16U711Mar 24, 2026164 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.2.1

16U711 · Mar 24, 2026 · 130 MB

16U711Mar 24, 2026130 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.0.1

16U693 · Jan 26, 2021 · 502 MB

16U693Jan 26, 2021502 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.1

16U693 · Jan 26, 2021 · 485 MB

16U693Jan 26, 2021485 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1

16U693 · Jan 26, 2021 · 485 MB

16U693Jan 26, 2021485 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.2

16U693 · Jan 26, 2021 · 470 MB

16U693Jan 26, 2021470 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.0

16U693 · Jan 26, 2021 · 502 MB

16U693Jan 26, 2021502 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.3

16U693 · Jan 26, 2021 · 470 MB

16U693Jan 26, 2021470 MBSignedDownload

watchOS 4

461 files
watchOS 4 firmware for Apple Watch Series 3 (38mm)
VersionBuildReleasedSizeStatusDownload
watchOS 4.3.2Unsigned

15U70 · Jul 9, 2018 · 1.11 GB

15U70Jul 9, 20181.11 GBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 59 MB

15U6070Jul 9, 201859 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 122 MB

15U70Jul 9, 2018122 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 100 MB

15U70Jul 9, 2018100 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 111 MB

15U70Jul 9, 2018111 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 105 MB

15U70Jul 9, 2018105 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 167 MB

15U70Jul 9, 2018167 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 70 MB

15U6070Jul 9, 201870 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 126 MB

15U70Jul 9, 2018126 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 164 MB

15U70Jul 9, 2018164 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 64 MB

15U6070Jul 9, 201864 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 122 MB

15U70Jul 9, 2018122 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 81 MB

15U70Jul 9, 201881 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 155 MB

15U70Jul 9, 2018155 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 61 MB

15U70Jul 9, 201861 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 81 MB

15U70Jul 9, 201881 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2.3

15U70 · Jul 9, 2018 · 340 MB

15U70Jul 9, 2018340 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 114 MB

15U70Jul 9, 2018114 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2.2

15U70 · Jul 9, 2018 · 340 MB

15U70Jul 9, 2018340 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.0

15U70 · Jul 9, 2018 · 378 MB

15U70Jul 9, 2018378 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.1

15U70 · Jul 9, 2018 · 353 MB

15U70Jul 9, 2018353 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2

15U70 · Jul 9, 2018 · 340 MB

15U70Jul 9, 2018340 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U5069a · Jun 25, 2018 · 66 MB

15U5069aJun 25, 201866 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U5069a · Jun 25, 2018 · 119 MB

15U5069aJun 25, 2018119 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U5069a · Jun 25, 2018 · 54 MB

15U5069aJun 25, 201854 MBUnsignedDownload