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Mobile device operating system (OS) FAQs

Q: What is an operating system (OS)?

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®.

Q: 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: Android 15 Apple iOS 18 Windows 10 Mobile

Q: What's the difference between an OS update (system update) and a software update?

Types of software updates Update Type Description Example OS update Update to a new version of the device OS (often includes significant changes to the on-screen look and how certain features work) Android device update from OS 11 to OS 12 Software update Minor update to current OS version (may include fixes to issues or enhancements to certain features) OS update from 12.1.1 to 12.1.2

Q: How do I know what OS my device has?

To see what OS your device has installed, follow the instructions in the links below: Android Apple Windows Tap Settings. Tap About. Tap More info for OS information.

Q: 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.

Q: 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.

Q: What are the current versions of each smartphone OS?

Android – Android 15 Apple – iOS 18 Windows – Windows 10 Mobile (discontinued)

Q: 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.

Learn what an OS is and how to manage your device’s OS version.

Find more topics in Additional support

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About

Managing

OS versions

Expand All

What is an operating system (OS)?

Where can I learn about the features of the current smartphone OS versions?

What's the difference between an OS update (system update) and a software update?

Types of software updates
Update Type	Description	Example
OS update	Update to a new version of the device OS (often includes significant changes to the on-screen look and how certain features work)	Android device update from OS 11 to OS 12
Software update	Minor update to current OS version (may include fixes to issues or enhancements to certain features)	OS update from 12.1.1 to 12.1.2

Expand All

How do I know what OS my device has?

How do I know when an OS update is available for my device?

Why should I update my device OS?

Expand All

What are the current versions of each smartphone OS?

Can I revert to a previous OS version on my device?

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.

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Mobile device operating system (OS) FAQs

What is an operating system (OS)?

Where can I learn about the features of the current smartphone OS versions?

What's the difference between an OS update (system update) and a software update?

Additional support

Software Updates