Comparison between ios 15.3 and ios 15.4.

There is a big difference between ios 15.3 and ios 15.4, mainly due to the improvement of battery life and fluency. In addition, ios 15.4 supports users to unlock their phones with Face ID while wearing a mask.

You can freely share music, videos and so on between devices such as iOS, iPad OS and MacOS. There is also a focus mode, which is very popular on Android phones. The SMS iMessage function can add pictures, set unread, link external articles, and even enjoy photos and music.

Control center:

It is convenient for you to use those much-needed control options and apps at any time. Simply slide up from any screen (including the lock screen), you can switch to flight mode, turn WLAN on or off, and adjust the screen brightness. You can even use a brand-new flashlight for lighting. So many operations are at your disposal.

You can turn airplane mode, WLAN, Bluetooth and do not disturb mode on or off, lock the screen orientation or adjust its brightness, play, pause or skip songs, connect devices that support AirPlay, and quickly use the flash, timer, calculator and camera.