title: do ALL android smartphones have accelerometer axis pointing in the same directions?
body: <p>I was wondering if ALL android smartphones have the orientation of the 3-axis of the accelerometer pointing in the same direction w.r.t. the device.</p>
  
  <p>Well I wanted to post an image, but it seems i don't have the reputation to do it so..</p>
  
  <p>Assume the smartphone is held vertically with the speaker above the screen and you are looking at the screen, so the axis will be:</p>
  
  <ul>
  <li>positive x axis associated to the width of the device and pointing to the RIGHT</li>
  <li>positive y axis associated to the height of the device and pointing UP </li>
  <li>positive z axis through the device and pointing towards you</li>
  </ul>
  
  <p>Is it the case for all ANDROID smartphones?</p>