Apple has launched the first major update for its mobile operating system, iOS 4, which runs the iPhone, iPod Touch and iPad.
Apple CEO, Steve Jobs, said the new release would address Bluetooth, iPhone 3G and proximity sensor issues.
The latest release, iOS 4.1, introduces new features, such as high dynamic range photos, Apple's social gaming service, Game Centre and TV show rentals in iTunes.
The iOS 4.1 software is available to download and also works with the second-, third- and fourth-generation iPod Touch.
IT security firms have previously warned that a vulnerability in Apple's iOS could allow hackers to take control of these devices.
The Android smartphone operating system (OS) recently overtook Apple's iOS to become the third most popular smartphone OS globally.