title: Digital compass without a magnetic field sensor?
body: <p>How is it possible, that a Phone can have a digital compass but no magnetic field sensor? In the German data speciation below there a two different sensors: magnet field sensor (Magnetfeldsensor) and compass (Digitaler Kompass) listed.
  The Huawei P9 has a compass but no magnetic field sensor. 
  See under “Ortung/Sensoren”.</p>
  
  <p><a href="http://www.sortierbar.de/smartphone/huawei-p9" rel="nofollow noreferrer">http://www.sortierbar.de/smartphone/huawei-p9</a></p>
  
  <p>What is are the differences between these sensors? 
  Can I get from the compass magnet field data?</p>