Downgrade iPhone from iOS 26 to iOS 18

If you've recently updated your iPhone to iOS 26 but find it unstable or incompatible with your daily apps, downgrading back to iOS 18 can help restore your device’s smooth performance. I went through this process myself and learned a few important things worth sharing. First and foremost, backing up your iPhone via iCloud or iTunes before attempting any downgrade is non-negotiable. This safeguards your data since the downgrade process will erase the device. From personal experience, skipping this can lead to losing photos, contacts, and messages permanently. I used FoneTool Repair for the downgrade, which simplifies the procedure substantially. After connecting my iPhone to the PC and selecting the downgrade option, I chose iOS 18 as my target version. The tool downloads the correct firmware and guides you to start the downgrade safely. It’s also handy because it can help fix system issues that might occur during the process. One tricky part to keep in mind is that Apple only allows downgrading to iOS versions that are still "signed". This means that after Apple stops signing a version like iOS 18, you won’t be able to install it officially anymore. Therefore, if you decide to downgrade, it’s best to act quickly while Apple still signs your preferred older iOS. After the downgrade, restoring your backup is essential to recover your apps, settings, and data. From my experience, sometimes apps need to be reinstalled or updated after the downgrade, but overall the phone feels much more stable. Downgrading iOS isn’t officially encouraged by Apple, but with the right precautions and tools, it’s a feasible way to regain control over your iPhone experience when a new update doesn’t meet your needs. Always ensure you understand the risks, keep backups, and confirm that your desired iOS version is still signed before proceeding.