Does the problem happen only on Android 10? Old Android devices expose this setting under a single toggle named 'Install App from Unknown Sources'. In most cases, this is the app being updated, a file manager or the browser. Enable the permission for the app which you use to install your APK.

In order to allow installation of apps from other sources, open the Settings app and locate 'Install Unknown Apps' under Privacy/Security settings. Does the device allow installation from unknown sources?īy default Android allows installation only from the Play Store. Installing an app requires at least twice the space consumed by the APK package plus total uncompressed space consumed by the app files. If changing the signature was intentional, you can go ahead and change the package name as well, or just communicate the change with your testers and ask them to uninstall the app with deprecated signatures before proceeding with the installation. In order to prevent this error in the future, please make sure you always sign your consecutive builds with the same signature. In order to solve that, please delete the app from your device and try again. Android does not allow different signatures for the same package name.

It might be that an app with the same package name that has a different signature is already be installed on your device. Here are a few possible reasons: Is the app already installed on your device?

Are are having problem installing an app on Android 10, and getting an error message 'App not installed'?

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