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windows-phone-8.1windows-phone-store

Error code 80073cf9 when installing my own app from Store

I get the error code 80073cf9 when I try to install an 8.1 app (.appx) from the Store on my 920 with 8.1 Preview.

The app is 8.1 only and I'm able to run it and install it when deploying from my laptop.

I have the development build installed on my phone.

Solution

  • Solution

    Uninstall the development build from your phone and then you will be able to download the app from Store.

    Some interesting facts

    Since 8.1 (.appx) you can not install an app from Store if you already have the app installed. This include your development builds deployed from your computer.

    Before 8.1 (.xap) you were able to run both your development build and the Store app at the same time. This was since the Store changed the GUID of the app when it was uploaded. For some reason Store doesn't change the GUID of the uploaded app anymore.