Apple Officially Blocks iPhone Users Downgrading to iOS 16.5.1

Buzz

Ngày cập nhật gần nhất: 15/4/2026

Apple consistently locks signing for older iOS versions to prevent security vulnerabilities and ensure users' devices are running the latest software versions.

Following the release of .6 last week, Apple has now locked signing for iOS 16.5.1. This means iPhone users after upgrading to the latest iOS version will no longer be able to downgrade to iOS 16.5.1.

Apple locks signing for iOS 16.5.1

According to 9to5mac, this move from Apple doesn't come as much of a surprise since the company typically stops signing older iOS versions a few weeks after introducing a new iOS version. This action is viewed as part of Apple's efforts to assist users in updating to the latest features and ensuring device security.

Furthermore, in recent years, there have been very few reasons for users to downgrade to older iOS versions, especially since they often update iOS directly over the air (OTA) rather than through iTunes. Previously, most users would downgrade iOS to facilitate jailbreaking.

Currently, the latest official iOS version is iOS 16.6. Additionally, Apple is also testing for an official release to users this fall.

Read more: Apple officially releases iOS 16.6 and iPadOS 16.6 with significant bug fixes, inviting you to update

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