iOS 15.4 brings the long-awaited mask-wearing unlocking feature to users of iPhone 12 and iPhone 13, and in order to experience this new feature, many players have already completed the upgrade.
According to past experience, it is normal for the new system version to roll over, but iOS 15.4 is late but arrives, and many users complain that the storage capacity of mobile phones after the update is reduced, the battery life is worse, and so on. Especially in terms of battery life, the battery capacity that was not rich in the original was even worse after updating the system.
For the shorter battery life after the update, Apple's official website responded "normal" and suggested that users wait 48 hours before testing, and the downgrade channel has been closed, and users can only wait for Apple to launch a new iOS version to fix the bug.
(7892683)