This article explains which mobile operating systems are supported by the KAST app, what happens if you're using an older device, and what you can do if you experience issues related to your phone's operating system version.
What Mobile Operating Systems Does KAST Officially Support?
KAST actively tests and supports the latest major versions of iOS and Android.
Officially Supported Versions
Platform |
Officially Supported Versions |
|---|---|
iOS |
Last 2 major versions (currently iOS 26 and iOS 18) |
Android |
Last 4 major versions (currently Android 16, 15, 14, and 13) |
For these versions, KAST:
- Actively tests app releases
- Investigates reported issues
- Provides break-fix support when problems occur
What Happens If I'm Using an Older Operating System?
The KAST app still works on older operating systems, but those versions are not actively supported.
Minimum Supported Versions
Platform |
Minimum Supported Version |
|---|---|
iOS |
iOS 15.5 |
Android |
Android 10 |
If you're using below these minimum versions:
- The app will continue to function
- Some features may not work as expected
- Performance and user experience may be reduced
- New features may not be fully supported
- Bug fixes will not be provided for issues specific to older operating systems
Why Might the KAST App Not Work Properly on My Device?
KAST regularly updates its app to improve security, performance, and reliability.
If you're using an older version of iOS or Android, you may experience:
- Missing features
- Reduced functionality
- Performance issues
- Compatibility problems after app updates
To ensure the best experience, KAST officially supports only a limited number of recent operating system versions.
How Do I Check My Operating System Version?
On iPhone
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On Android
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How Do I Check My KAST App Version?
If KAST Concierge asks for your app version, you can find it inside the app:
- Open the KAST app.
- Tap your Profile icon.
- Open Settings.
- Scroll to the bottom to find the App Version.
What Should I Do If I'm Experiencing Issues?
If you're using an older operating system:
- Check your current OS version.
- Update your device to the latest available version, if possible.
- Update the KAST app to the latest version.
- Restart the app and try again.
If the issue continues after updating, contact KAST Concierge and include:
- Your device model
- Your operating system version
- The version of the KAST app you're using
- A description of the issue
Frequently Asked Questions
Can I still use KAST on an older phone?
Yes. KAST will continue to work on older devices and operating systems. However, versions below the minimum supported requirements are not officially supported and may experience reduced functionality or compatibility issues.
Will KAST stop working immediately if my phone isn't on a supported version?
No. The app will continue to function on older operating systems, but KAST does not actively test or support those versions.
How do I know if my operating system is officially supported?
KAST officially supports the last 2 major iOS versions and the last 4 major Android versions. Devices running those versions receive active testing and support.
What happens if a feature doesn't work on my older device?
Some features may not be available or may not perform as expected on older operating systems. Updating your device to a supported operating system version is the best way to ensure access to the latest KAST features and improvements.
Will I be forced to update my operating system?
Not necessarily. However, newer versions of the KAST app will work best on supported operating systems, and updating your device is recommended whenever possible.