Download iOS 14.3 (18C66) for iPhone 6s

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone8,1
iOS Version 14.3
Release Date 2020-12-14
Update Date 2024-06-03
Sha1sum
dfd7d0167a49ac3138beec24998ae5cd9355df7b
Sha256sum
2040f73793ba3d3361bad72ecae36d3c0919e6798cd60581a5ba2f8d459f3293
md5sum
a544da03166662cc754ab091d0e4611b
Size 4.24 GB
FileName
iPhone_4.7_14.3_18C66_Restore.ipsw
Status

Download IPSW (4.24GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iOS 14.3 includes support for Apple Fitness+ and AirPods Max. This release also adds the ability to capture photos in Apple ProRAW on iPhone 12 Pro, introduces Privacy information on the App Store, and includes other features and bug fixes for your iPhone.

Apple Fitness+

AirPods Max

Photos

Privacy

TV app

App Clips

Health

Weather

Safari

This release also addresses the following issues:

Some features may not be available for all regions or on all Apple devices. For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/kb/HT201222