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Apple is currently pushing a broad wave of automatic upgrades to iOS 26, and while some users may find little appeal in its new liquid glass visual effect, those already upgraded have no way to undo the transition.
This is because Apple has now disabled signature verification for iOS 18.6.2, meaning any device that has moved to iOS 26 can no longer roll back to 18.6.2 and is effectively locked to the latest system.
In fact, there is a newer build — iOS 18.7 — released after 18.6.2, but Apple has yet to provide IPSW firmware files that would allow iOS 26 users to downgrade to that version. iOS 18.7 consists mainly of security updates, and under normal circumstances, Apple would publish the firmware for manual installation. Why it has not done so in this case remains unclear, though it is possible the company may release it later, enabling a downgrade path for iOS 26 users.
For those who have not yet updated, it is still possible to pause automatic updates in Settings and wait until iOS 26 becomes more stable or offers a better user experience before committing to the upgrade.
Some devices inevitably experience lag or reduced responsiveness after major updates, prompting certain users to disable automatic updates altogether in hopes of preserving smoother performance on older builds. However, an increasing number of applications now require iOS 26 as a minimum, leaving users with little choice but to eventually adopt the new system.
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