The Nokia Lumia 800 has a hidden diagnostics tool that provides tests for troubleshooting potential issues in the device. The tests are not necessarily complete and do not substitute authorized service repair, but I thought it’d be cool to show how to get access.

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Press ##634# at the phone dialer and the diagnostics tool will open. It will also now appear in your app list. I don’t think this is available on other Windows Phone devices from other manufacturers like HTC or Samsung.

Here are the following tests:

• Accelerometer
• ALS
• Audio Loopback
• Bluetooth
• Camera
• Battery Status
• DTMF
• Hardware Buttons
• Headset Detection
• LCD White
• Lights
• Magnetometer
• Power Source
• Proximity
• Speaker
• Touch
• Vibra

I didn’t cover all the tests in the video, so try it out and see for yourself.

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