How can I revert iphone to previous ios 18?

Since the technical reality is that a computer is required, you have a few paths forward:

Borrow Access to a Computer: To revert iPhone to previous iOS. If you don't own a computer, you can borrow one from a friend or family member. You can also visit an Apple Store or an authorized service provider and ask to use one of their Macs for the downgrade process .

Use a Different Computer-Based Software: If you reconsider using these types of tools on a borrowed computer, a downgrade becomes possible.

Stay on the Current Version: This is not ideal, but it is an option. You can keep your phone on its current iOS version and wait for Apple to release subsequent updates to fix the problems you are experiencing.

A computer is an unavoidable requirement for downgrading your iPhone's operating system, as it is required both to download the necessary firmware and to perform the installation. Before you go to the trouble of finding a computer, it is critical to first check if you revert iPhone to previous iOS is even possible. As of late 2025, news reports from reliable sources indicate that Apple has stopped signing all versions of iOS 18, meaning a downgrade is no longer possible for anyone, regardless of what tools they have.