Apple Watch Series 4 (40mm, LTE)

Identifier: Watch4,3

OTA Update
Version Build Status Size Action
5.3.10 16U711 Signed 1.37 GB Download
6.3.1 17U224 Signed 0.18 GB Download
5.3.9 16U693 Signed 0.46 GB Download
6.3 17U216 Unsigned 0.57 GB Download
5.3.8 16U680 Unsigned 1.37 GB Download
5.3.7 16U674 Unsigned 0.05 GB Download
5.3.6 16U662 Unsigned 0.05 GB Download
5.3.5 16U652 Unsigned 0.05 GB Download
5.3.4 16U627 Unsigned 0.06 GB Download
6.1.1 17S5433b Unsigned 0.39 GB Download
6.1 17S5083a Unsigned 0.36 GB Download
5.3.3 16U620 Unsigned 0.05 GB Download
6.1 17S5076a Unsigned 0.36 GB Download
6.1 17S5068e Unsigned 0.45 GB Download
6.1 17S5059e Unsigned 0.25 GB Download
6.0.1 17R605 Unsigned 0.69 GB Download
6.0.1 17R6605 Unsigned 0.55 GB Download
6.1 17S5054e Unsigned 0.26 GB Download
5.3.2 16U611 Unsigned 1.37 GB Download
6.0 17R6575 Unsigned 1.41 GB Download
6.0 17R575 Unsigned 1.41 GB Download
6.0 17R5575a Unsigned 0.78 GB Download
5.3.1 16U600 Unsigned 0.15 GB Download
5.3.1 16U6600 Unsigned 0.14 GB Download
6.0 17R5571a Unsigned 0.07 GB Download
6.0 17R5566a Unsigned 0.69 GB Download
6.0 17R5556d Unsigned 0.69 GB Download
6.0 17R5546f Unsigned 0.69 GB Download
5.3 16U569 Unsigned 0.15 GB Download
5.3 16U6569 Unsigned 0.12 GB Download
6.0 17R5532f Unsigned 0.70 GB Download
5.3 16U5569a Unsigned 0.21 GB Download
5.3 16U5566a Unsigned 0.11 GB Download
6.0 17R5521e Unsigned 0.67 GB Download
5.3 16U5558b Unsigned 0.18 GB Download
6.0 17R5507l Unsigned 0.66 GB Download
5.3 16U5545c Unsigned 1.37 GB Download
6.0 17R5491t Unsigned 0.79 GB Download
5.3 16U5537b Unsigned 0.10 GB Download
5.3 16U5526f Unsigned 0.08 GB Download
5.2.1 16U113 Unsigned 0.18 GB Download
5.2.1 16U6113 Unsigned 0.12 GB Download
5.2.1 16U5113a Unsigned 0.48 GB Download
5.2.1 16U5110a Unsigned 0.14 GB Download
5.2.1 16U5101c Unsigned 0.13 GB Download
5.2.1 16U5091b Unsigned 0.20 GB Download
5.2.1 16U5079d Unsigned 0.45 GB Download
5.2 16T225 Unsigned 0.45 GB Download
5.2 16T6225 Unsigned 0.09 GB Download
5.2 16T5225a Unsigned 0.08 GB Download
5.2 16T5222a Unsigned 0.47 GB Download
5.2 16T5212e Unsigned 0.46 GB Download
5.2 16T5201c Unsigned 0.48 GB Download
5.2 16T5191d Unsigned 0.41 GB Download
5.2 16T5181f Unsigned 0.41 GB Download
5.1.3 16S6535 Unsigned 0.07 GB Download
5.1.3 16S535 Unsigned 0.16 GB Download
5.1.3 16S5535a Unsigned 0.16 GB Download
5.1.3 16S5531a Unsigned 1.35 GB Download
5.1.3 16S5523a Unsigned 0.16 GB Download
5.1.2 16S46 Unsigned 0.20 GB Download
5.1.2 16S6046 Unsigned 0.08 GB Download
5.1.2 16S5046a Unsigned 0.16 GB Download
5.1.2 16S5042a Unsigned 0.20 GB Download
5.1.1 16R6600 Unsigned 0.08 GB Download
5.1.1 16R600 Unsigned 0.17 GB Download
5.1 16R591 Unsigned 0.17 GB Download
5.1 16R6591 Unsigned 0.12 GB Download
5.1 16R5589c Unsigned 0.12 GB Download
5.1 16R5584a Unsigned 0.12 GB Download
5.1 16R5577c Unsigned 0.16 GB Download
5.1 16R5568d Unsigned 0.18 GB Download
5.0.1 16R382 Unsigned 1.36 GB Download
5.1 16R5559d Unsigned 0.16 GB Download
5.0 16R364 Unsigned 1.36 GB Download

How to install firmware on your Apple Watch Series 4 (40mm, LTE)

To restore your device using a firmware file, you will need a computer (Mac or PC) and the latest version of Finder or iTunes.

Step-by-step Guide:

  1. Download the firmware: Select the correct OS version from the table above.
  2. Connect your device: Use a high-quality cable to connect to your computer.
  3. Perform the restore: On Mac: Option (⌥) + Restore. On Windows: Shift + Restore.