Apple blocks iPhone users from downgrading to iOS 17.5.1

Recently, Apple stopped signing iOS 17.5.1, preventing iPhone users from downgrading to that version of iOS.

This move is not surprising to iOS users as Apple often locks the signing of old iOS versions to prevent users from downgrading.

Apple typically stops signing an older version of iOS, usually within a week or two of the new version being released. When an update is stopped signing, it can’t be installed on an ‌iPhone‌ due to server-side software verification checks.

Apple blocks iPhone users from downgrading to iOS 17.5.1. Photo Internet

According to Macrumors, this is not a surprising move from Apple because the company usually stops signing old iOS versions a few weeks after launching a new iOS. This is considered part of the "Apple" effort to help users update the latest features and ensure device security. Previously, the company also stopped signing iOS 17.5.

In addition, in recent years, there has been little reason for users to downgrade to an older version of iOS, especially when they often update iOS directly via OTA instead of via iTunes. Previously, most users often downgraded iOS to jailbreak.

Currently, the latest official iOS version is iOS 17.6. In addition, the company is also testing iOS 18 to officially release this software to iPhone users this fall.

Highlights in iOS 17.6 update

Apple has just released the iOS 17.6 update, bringing many important upgrades and bug fixes to the iPhone. Users can update to iOS 17.6 by going to Settings => General => Software Update. This update is recommended to take advantage of the latest improvements and security..

iOS 17.6 performance improvements

iOS 17.6 brings significantly more stable performance. Users do not encounter lag or any unusual problems during use. The screen operates smoothly, providing a comfortable and pleasant feeling of use.

Improved battery life

One of the most notable features of iOS 17.6 is improved battery life. After three days of use, users have noticed a significant increase in battery life, helping to extend the operating time of the device.

Enhanced Security

In terms of security, iOS 17.6 has fixed many important vulnerabilities. Notably, the bug that allowed access to hidden photos without authentication has been fixed, ensuring privacy for users. Vulnerabilities related to the Shortcuts application have also been fixed, along with many other security improvements.

Source: https://khoahocdoisong.vn/apple-chan-nguoi-dung-iphone-ha-cap-ve-ios-1751-post244010.html