Download iOS 26.0.1 (23A355) for iPhone 15

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 iPhone15,4
iOS Version 26.0.1
Release Date 2025-09-29
Update Date 2025-09-26
Sha1sum
44eccba500fdcf755e8a4e1f8a63fc7cf1c094c4
Sha256sum
08b830f926bef7dc6fdb19c01a68f1d130e961bf87d313c1a5e1f1cc90c8ee87
md5sum
8a2c7e9b3974cbc22930c14bb1e5750b
Size 9.28 GB
FileName
iPhone15,4_26.0.1_23A355_Restore.ipsw
Status

Download IPSW (9.28GB) Check device info
Release Notes

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

This update provides important bug fixes and security updates for your iPhone, including fixes for the following issues:

For information on the security content of Apple software updates, please visit:

https://support.apple.com/100100

IPSW File Download FAQ