iPhone 6s+ · iPhone8,2

iPhone 6s+ · iOS 14.3

18C66Unsigned

Catalog data · Last updated: Oct 23, 2026, 2:20 AM UTC

Restore IPSW for iPhone 6s+: iOS 14.3, build 18C66.

Firmware information

Version: iOS 14.3
Build: 18C66
IPSW: Restore IPSW
Size: 4.5 GB
Release date: Dec 14, 2020, 5:59 PM UTC
File name: iPhone_5.5_14.3_18C66_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone_5.5_14.3_18C66_Restore.ipsw

Back up before you restore. A restore can erase the data on the device. The identifier has to match, and a file you can download may still be rejected for restore.

Checksum

SHA-25638fcb191f4d5c25ca7be72ccac559ace385ccadba018608bb1c86c1ea4b54e1f

SHA-14d3ae504d0b117caf594d10b6fe12766f8179e45

MD5927f8f8ecfb6946e6234d69dd667161f