title: Magnetic Field Sensor calibration on ANDROID
body: <p>I'm making an application that works as a compass..</p>
  
  <p>I'm using the accelerometer and the magnetic field sensors to compute the azimuth angle through, <code>sensor.getOrientation()</code>.</p>
  
  <p>I'm searching for something that can improve the magnetic field sensor accuracy, since I'm getting it state of accuracy as UNRELIABLE!</p>
  
  <p>Any one knows anything about this?I'm looking for something that can be either hardcoded or for instance just physically moving the phone until it gets calibrated!</p>