Windows Phone Store download link:

In this app you test your knowledge about the contacts registered on your phone.

In each game, you'll answer a question about a contact's phone number:

  • Which carrier does he/she use?
  • Which kind of network does the number use?
  • Which country prefix does the number use?
  • In which country has the number been registered?
  • Which is your contact's phone number?

Most of this information is brought to you by Nexmo's Number Insight API, which retrieves useful information about phone numbers.

Your information is stored in your local phone only.

Download the app! It is available in the Windows Phone Store:

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