Revision as of 07:58, 30 January 2013 by hamishwillee (Talk | contribs)

Windows Phone Diagnostic Tools

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This article explains how to access the Windows Phone diagnostic tools.

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Article Metadata
Tested with
Devices(s): Nokia Lumia 800, Nokia Lumia 710
Platform(s): Windows Phone 7.5
Windows Phone 8
Windows Phone 7.5
Created: hamishwillee (17 May 2012)
Last edited: hamishwillee (30 Jan 2013)



Nokia Windows phones devices have a "hidden" diagnostic app. This app can be used to confirm that device functionality is present and working as expected, and is particularly useful for verifying whether "odd" results are due to your code or to information from the hardware.

The tools can be accessed for the first time by entering ##634# on the call screen/dialler. Subsequently the app is listed with all your others under the title Diagnostics.

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What tools are included

The first option in the app is Run all tests which you can use to run a full set of diagnostic tests on your device. You can also run individual tests as listed in the following section. Note that some hardware may not be present on some devices, and hence some tests may not be valid.

The tools included (at time of writing 17th May, 2012) include:

  • Accelerometer
  • ALS
  • Audio Loopback
  • Bluetooth
  • Camera
  • Battery Status
  • DTMF
  • Gyroscope (not supported on Nokia Lumia 800)
  • Hardware Buttons
  • Headset Detection
  • LCD White
  • Lights
  • Magnetometer
  • Power Source
  • Proximity
  • Speaker
  • Touch
  • Vibra


Are these tools present on other Windows Phone devices

Yes. These tools are (anecdotally) present on other devices. Note however that they may be accessed through the file manager or some other key combination. The key combination for Nokia devices may not work.

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