iOS 26.5.1 (23F81) for iPhone Air

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Firmware Information

Version 26.5.1

Build ID 23F81

Release Date Jun 1, 2026

Upload Date May 28, 2026

Filename iPhone18,4_26.5.1_23F81_Restore.ipsw

File Size 10.28 GB

MD5 be05ca2cb43131b1d653ee040d639d8e

SHA1 d42f24d7cfb634bc7d636b1701c092ac8c684e79

Device Information

Device iPhone Air

Identifier iPhone18,4

BoardConfig D23AP

Platform t8150

CPID 33104

BDID 10