Use Your Windows Phone As A Wired Microphone

What you'll need:

Male to male headphone cable (a must)
A free line-out extension
Wifi or data plan

1. Download RealMicrophone from your Windows Phone.
2. Plug in your headphone jack (must be double sided!)
3. Enable 'Line-in' by hitting start and type manage audio. Click the matching result (there will be a few other options.) Now, make sure Line in is set to enabled.
4. On RealMicrophone, swipe to the next screen and hit 'play'

Enjoy your newfangled microphone. This is ideal for people who want to use VoIP or Rosetta Stone but don't have a proper microphone.