Apply the Interop Unlock tweak to permit the installation of unsigned marketplace packages. Step 2: Use the Deployment Tools
Fix: The XAP is for ARMv7 (WP7) and you are on an ARMv8 device, or vice versa. Check the archive notes. windows phone xap archive
the Windows Phone SDK light (or similar deployment tools). Connect your phone via USB. Open the "Windows Phone Application Deployment" tool. Select the XAP file and click Deploy . Method 2: SD Card Installation (WP 8.1) Copy the .xap file to the root of your SD card. Open the Store app on your phone. Select "Install local apps" from the menu. Limitations and Troubleshooting Apply the Interop Unlock tweak to permit the
