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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, LTE)

Apple Watch Series 3 (38mm, LTE) firmware downloads

Model Watch3,1 · Board N111sAP · 127 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 · 1.44 GB

    Download

  • watchOS 5.3.10

    Build 16U711 · Mar 24, 2026 · 1.34 GB

    Download

  • watchOS 5.3.9

    Build 16U693 · Nov 5, 2020 · 1.34 GB

    Download

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

All firmware

127 versions

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

  • watchOS 6427
  • watchOS 51107
  • watchOS 4486

watchOS 6

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

Update from watchOS 6.3

17U224 · Feb 2, 2026 · 190 MB

17U224Feb 2, 2026190 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.8

17U224 · Feb 2, 2026 · 215 MB

17U224Feb 2, 2026215 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.5

17U224 · Feb 2, 2026 · 305 MB

17U224Feb 2, 2026305 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.6

17U224 · Feb 2, 2026 · 305 MB

17U224Feb 2, 2026305 MBSignedDownload
watchOS 6.3.1LatestSigned

17U224 · Feb 2, 2026 · 1.44 GB

17U224Feb 2, 20261.44 GBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.0

17U224 · Feb 2, 2026 · 733 MB

17U224Feb 2, 2026733 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.0.1

17U224 · Feb 2, 2026 · 733 MB

17U224Feb 2, 2026733 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1

17U224 · Feb 2, 2026 · 617 MB

17U224Feb 2, 2026617 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.2

17U224 · Feb 2, 2026 · 604 MB

17U224Feb 2, 2026604 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.3

17U224 · Feb 2, 2026 · 604 MB

17U224Feb 2, 2026604 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2

17U224 · Feb 2, 2026 · 355 MB

17U224Feb 2, 2026355 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.2.1

17U224 · Feb 2, 2026 · 355 MB

17U224Feb 2, 2026355 MBSignedDownload
watchOS 6.3.1Signed

Update from watchOS 6.1.1

17U224 · Feb 2, 2026 · 607 MB

17U224Feb 2, 2026607 MBSignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.0.1

17U216 · Jan 26, 2021 · 635 MB

17U216Jan 26, 2021635 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.0

17U216 · Jan 26, 2021 · 635 MB

17U216Jan 26, 2021635 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2

17U216 · Jan 26, 2021 · 219 MB

17U216Jan 26, 2021219 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.3

17U216 · Jan 26, 2021 · 503 MB

17U216Jan 26, 2021503 MBUnsignedDownload
watchOS 6.3Unsigned

17U216 · Jan 26, 2021 · 1.44 GB

17U216Jan 26, 20211.44 GBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.1

17U216 · Jan 26, 2021 · 219 MB

17U216Jan 26, 2021219 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1

17U216 · Jan 26, 2021 · 516 MB

17U216Jan 26, 2021516 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.2

17U216 · Jan 26, 2021 · 503 MB

17U216Jan 26, 2021503 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.8

17U216 · Jan 26, 2021 · 87 MB

17U216Jan 26, 202187 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.1.1

17U216 · Jan 26, 2021 · 505 MB

17U216Jan 26, 2021505 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.5

17U216 · Jan 26, 2021 · 171 MB

17U216Jan 26, 2021171 MBUnsignedDownload
watchOS 6.3Unsigned

Update from watchOS 6.2.6

17U216 · Jan 26, 2021 · 171 MB

17U216Jan 26, 2021171 MBUnsignedDownload

watchOS 5

1107 files
watchOS 5 firmware for Apple Watch Series 3 (38mm, LTE)
VersionBuildReleasedSizeStatusDownload
watchOS 5.3.10Signed

16U711 · Mar 24, 2026 · 1.34 GB

16U711Mar 24, 20261.34 GBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.0

16U711 · Mar 24, 2026 · 544 MB

16U711Mar 24, 2026544 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1

16U711 · Mar 24, 2026 · 527 MB

16U711Mar 24, 2026527 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.1

16U711 · Mar 24, 2026 · 527 MB

16U711Mar 24, 2026527 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.2

16U711 · Mar 24, 2026 · 513 MB

16U711Mar 24, 2026513 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.0.1

16U711 · Mar 24, 2026 · 544 MB

16U711Mar 24, 2026544 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.1.3

16U711 · Mar 24, 2026 · 512 MB

16U711Mar 24, 2026512 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.8

16U711 · Mar 24, 2026 · 104 MB

16U711Mar 24, 2026104 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.9

16U711 · Mar 24, 2026 · 102 MB

16U711Mar 24, 2026102 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.5

16U711 · Mar 24, 2026 · 106 MB

16U711Mar 24, 2026106 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.7

16U711 · Mar 24, 2026 · 104 MB

16U711Mar 24, 2026104 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.4

16U711 · Mar 24, 2026 · 106 MB

16U711Mar 24, 2026106 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.6

16U711 · Mar 24, 2026 · 106 MB

16U711Mar 24, 2026106 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.3

16U711 · Mar 24, 2026 · 106 MB

16U711Mar 24, 2026106 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.2.1

16U711 · Mar 24, 2026 · 159 MB

16U711Mar 24, 2026159 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.2

16U711 · Mar 24, 2026 · 110 MB

16U711Mar 24, 2026110 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.2

16U711 · Mar 24, 2026 · 189 MB

16U711Mar 24, 2026189 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3.1

16U711 · Mar 24, 2026 · 111 MB

16U711Mar 24, 2026111 MBSignedDownload
watchOS 5.3.10Signed

Update from watchOS 5.3

16U711 · Mar 24, 2026 · 115 MB

16U711Mar 24, 2026115 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.2

16U693 · Jan 26, 2021 · 500 MB

16U693Jan 26, 2021500 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.1

16U693 · Jan 26, 2021 · 516 MB

16U693Jan 26, 2021516 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1.3

16U693 · Jan 26, 2021 · 500 MB

16U693Jan 26, 2021500 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.1

16U693 · Jan 26, 2021 · 516 MB

16U693Jan 26, 2021516 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.0.1

16U693 · Jan 26, 2021 · 532 MB

16U693Jan 26, 2021532 MBSignedDownload
watchOS 5.3.9Signed

Update from watchOS 5.0

16U693 · Jan 26, 2021 · 532 MB

16U693Jan 26, 2021532 MBSignedDownload

watchOS 4

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

15U70 · Jul 9, 2018 · 1.17 GB

15U70Jul 9, 20181.17 GBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 61 MB

15U6070Jul 9, 201861 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 103 MB

15U70Jul 9, 2018103 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 128 MB

15U70Jul 9, 2018128 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 182 MB

15U70Jul 9, 2018182 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 146 MB

15U70Jul 9, 2018146 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 67 MB

15U6070Jul 9, 201867 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 194 MB

15U70Jul 9, 2018194 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 153 MB

15U70Jul 9, 2018153 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 146 MB

15U70Jul 9, 2018146 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 138 MB

15U70Jul 9, 2018138 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U6070 · Jul 9, 2018 · 95 MB

15U6070Jul 9, 201895 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 82 MB

15U70Jul 9, 201882 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 190 MB

15U70Jul 9, 2018190 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 63 MB

15U70Jul 9, 201863 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.1

15U70 · Jul 9, 2018 · 82 MB

15U70Jul 9, 201882 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2.3

15U70 · Jul 9, 2018 · 371 MB

15U70Jul 9, 2018371 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3

15U70 · Jul 9, 2018 · 138 MB

15U70Jul 9, 2018138 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.1

15U70 · Jul 9, 2018 · 383 MB

15U70Jul 9, 2018383 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2

15U70 · Jul 9, 2018 · 371 MB

15U70Jul 9, 2018371 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2.2

15U70 · Jul 9, 2018 · 371 MB

15U70Jul 9, 2018371 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.0

15U70 · Jul 9, 2018 · 408 MB

15U70Jul 9, 2018408 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.0.1

15U70 · Jul 9, 2018 · 408 MB

15U70Jul 9, 2018408 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.2.3

15U5069a · Jun 25, 2018 · 369 MB

15U5069aJun 25, 2018369 MBUnsignedDownload
watchOS 4.3.2Unsigned

Update from watchOS 4.3.2

15U5069a · Jun 25, 2018 · 57 MB

15U5069aJun 25, 201857 MBUnsignedDownload