Following the release of iOS 15.4 last week, Apple on Wednesday stopped signing iOS 15.3.1 for all iPhone, iPod touch, and iPad models. This means that users can no longer downgrade their devices to iOS 15.3.1.

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固定链接 'Apple stops signing iOS 15.3.1, blocking downgrades from iOS 15.4' 提交: March 24, 2022, 5:50pm CST 由 Filipe Espósito