This is the most reliable method for Windows Phone 8.1 and Windows 10 Mobile devices.

Some older Windows Phone 8.1 devices allowed local installation: Copy the XAP file to your . Open the Store app on your phone.

Tap the three dots (...) and select . Note: This often requires an active internet connection for the Store to "verify" the app, which may no longer work as servers are offline. Important: Will the App Actually Work?

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