iOS 15.4.1 includes bug fixes and security updates for your iPhone and is recommended for all users.
This update includes the following bug fixes for your iPhone:
- Battery may drain more quickly than expected after updating to iOS 15.4
- Braille devices may become unresponsive while navigating text or displaying an alert
- Made for iPhone hearing devices may lose connection within some third-party apps
For information on the security content of Apple software updates, please visit this website:
https://support.apple.com/HT201222