To install APK files on Android, you need to enable installation from unknown sources. The process varies by Android version—here's how to do it on any device.

Android 14, 13, 12, 11 & 10

Modern Android versions use per-app permissions for better security:

Try to open the APK file
You'll see a prompt: 'For your security, your phone is not allowed to install unknown apps'
Tap Settings
Toggle on Allow from this source
Go back and tap Install

Alternative Method:

Go to Settings → Apps
Tap the three dots → Special access
Select Install unknown apps
Choose your file manager or browser
Toggle on Allow from this source

Android 9 (Pie) and 8 (Oreo)

Similar to newer versions, but the menu location may differ:

Go to Settings → Apps & notifications
Tap Advanced → Special app access
Select Install unknown apps
Choose the app you'll use to install APKs
Toggle on the permission

Android 7 (Nougat) and Earlier

Older versions use a global toggle:

Go to Settings → Security
Find Unknown sources
Toggle it on
Read the warning and tap OK

Samsung Devices

Samsung phones may have slightly different menus:

Settings → Biometrics and security
Scroll to Install unknown apps
Select the app to grant permission

Security Tips

Only enable for trusted apps you're about to install
Disable the permission after installation
Download APKs from reliable sources like Apkhitz
Keep Google Play Protect enabled

Troubleshooting

If you can't find the option:

Search 'unknown' in Settings
Check under Security or Privacy menus
Some work phones may have this disabled by IT policy

How to Enable Unknown Sources on Android (All Versions)