✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.
| Release Date | June 1, 2026 |
|---|---|
| Upload Date | May 28, 2026 |
| Filename | iPhone18,4_26.5.1_23F81_Restore.ipsw |
| Filesize | 10 GiB |
| SHA256sum | 5a5f57c78696d824de81f20f2ba4bf31125b3721ac55ddde5d65790897efef2d
|
| MD5sum | be05ca2cb43131b1d653ee040d639d8e
|
| SHA1sum | d42f24d7cfb634bc7d636b1701c092ac8c684e79
|
| Identifier | iPhone18,4 |
| Tags | iOS iOS 26.5.1 iPhone Air |
This update addresses an issue for a small number of users that may prevent wired charging on iPhone Air and iPhone 17 models when the battery is nearly drained.