Apple Watch Series 3 (42mm, LTE) watchOS 4.3 firmware
Apple Watch Series 3 (42mm, LTE)
Not signed
watchOS 4.3
Build 15T5199f For Watch3,2, N111bAP
Global · OTA update
A newer version is available for this region: watchOS 5.3.10
Apple no longer signs this version, so a normal restore with Finder or iTunes will fail. Use a signed version unless you know you need this one.
Download
1.17 GB
Downloads from appldnld.apple.com.
File details
- OS
- watchOS 4.3
- Region
- Global
- Type
- OTA update
- Released
- Size
- 1.17 GB
- File name
05451ee456ec40ab7c164b08a2d6f1dfe3a5e9db.zip
Before you download
- Make sure your device’s model number is one of: Watch3,2, N111bAP. You will find it in Settings → About phone, or on the box.
- This file is for the Global region. Installing another region’s firmware can remove features or block updates.
- This is an update package. It installs from the phone’s own update menu and keeps your data in most cases.
- Apple devices can only restore versions marked “Signed”.
- Back up your photos, contacts and files first, and charge the battery above 50%.
How to install
Apple Watch, HomePod and most Apple TV models update over the air. The OTA files listed here are the official update packages, useful for archiving and repair research. Normal users install them through Apple’s own update menus, not by hand.
Read the guide: Apple Watch, HomePod and Apple TV updates (OTA files)