Open the Settings app on your iPhone
Tap General
Tap Software Update
If iOS 26 is available for your device, tap Download and Install
Enter your passcode if prompted
Keep your iPhone connected to Wi-Fi and power until the update finishes
If iOS 26 is not shown, check whether your device is compatible
Join the Apple Beta Software Program if iOS 26 is only available as a beta
Back up your iPhone before installing any beta or major update
Download the update only from Apple’s official Software Update screen