iPhone SE · iPhone8,4

iPhone SE · iOS 14.3

18C66Unsigned

Catalog data · Last updated: Oct 23, 2026, 9:08 PM UTC

Restore IPSW for iPhone SE: iOS 14.3, build 18C66.

Firmware information

Version: iOS 14.3
Build: 18C66
IPSW: Restore IPSW
Size: 4.27 GB
Release date: Dec 14, 2020, 5:59 PM UTC
File name: iPhone_4.0_64bit_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_4.0_64bit_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-2560ff65eb6af1c0fe475ce5bbd15bdeb6e8547fb063b64ce09dad8ba7b644f426b

SHA-19b4ae780ba8c877150ca1bc75df64b45dd03eaf1

MD50bb147d58175b9bbd50b2990df860219