In the early morning of April 1, Apple officially pushed the iOS/iPadOS 15.4.1 update to iPhone and iPad users, and one of the most important improvements was to fix the problem that the previous iOS 15.4 battery drained too fast.
Apple mentioned in the system update that it is recommended for all users to install.
In the previous version of the system, some users reported poor battery life after the OTA upgrade, the iPhone 11 consumed 80% of the power in 24 hours, while the screen on time was only 2 hours, and the iPhone 13 Pro Max could only last half a day.
Some overseas testing institutions, after passing the actual test, found that the iPhone 12 and iPhone 13 series have a lot of endurance decline, which seriously affects the use experience.
However, although the battery life has become some trouble, iOS 15.4 still brings a very practical and well-received function, that is, mask unlocking.
After upgrading to iOS 15.4, enter the system settings and select "Face ID and Password", turn on the "Wear Mask to Use Face ID" switch, enter Face ID according to the prompts, and unlock the iPhone with the mask after completion.
This feature also solves the biggest drawback of Face ID, and it can also be easily and quickly unlocked in the current epidemic situation.