Apple Inc. this week said iOS 13 installations totaled 50 percent of all iPhone devices.
In addition, iOS 13 is installed on 55 percent of all iPhones sold in the last four years.
iOS 13 was released Sept. 20. New features include Dark Mode, new photo editing options, faster Face ID unlock, and an all-new Apple Maps.
iOS 13.1.3 contains bug fixes and improvements, including an issue that could prevent a device from ringing or vibrating for an incoming call, an issue that could prevent opening a meeting invite in Mail, an issue that could prevent Apple Watch from pairing, an issue where notifications may be received on Apple Watch, an issue where Bluetooth may disconnect on certain vehicles, improved connection of Bluetooth hearing aids and headsets, and launch performance of apps that use Game Center.