An OS is the main system software that allows your device to run. It determines how everything on the screen is laid out and how your device functions. It also gives you access to apps that are designed for your device's OS.
Examples of different operating systems include Android™, Apple® iOS and Windows®.
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Mobile device operating system (OS) FAQs
Learn what an OS is and how to manage your device’s OS version.
About operating systems
What is an operating system (OS)?
Where can I learn about the features of the current smartphone OS versions?
You can get more information on the current OS from the manufacturer's website:
What's the difference between an OS update (system update) and a software update?
Update Type | Description | Example |
OS update | Update to a new version of the device OS (often includes significant changes to the onscreen look and how certain features work) | Android device update from Marshmallow (6.0) to Nougat (7.0) |
Software update | Minor update to current OS version (may include fixes to issues or enhancements to certain features) | Nougat update from version 7.1.1 to 7.1.2 |
Managing your OS
How do I know when an OS update is available for my device?
You'll receive a notification on your device when an OS update is available for you to install.
You can also refer to the Software Updates page to see if a new version of your OS has been released for your device or if an update is coming soon.
Why should I update my device OS?
It's important to have the most current operating system software on your devices.
Software updates can improve device stability and provide a variety of additional benefits, including user experience improvements, bug fixes and the latest security patches.
OS versions
- Android – Android 13
- Apple – iOS 17
- Windows – Windows 10 Mobile (discontinued)
What are the current versions of each smartphone OS?
Can I revert to a previous OS version on my device?
OS updates provide performance improvements, enhancements and device security updates. It's recommended that you always install the most up-to-date version.
Because of this, we don't offer a way to revert to an older OS version.
Android is a trademark of Google, Inc. Use of this trademark is subject to Google Permissions.
iOS is a trademark or registered trademark of Cisco in the US and other countries and is used under license.
Windows Phone is either a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.
Apple is a registered trademark of Apple Inc.