title: Why modify playerprefs file for an Android Game developed with Unity3D doesn't work?
body: <p>I installed a game on my rooted android phone. I want more coins. And I know that, player data is stored using playerprefs.(I have part of source code of this game.) So I edit the xml file, which locate at </p>
  
  <pre><code>/data/data/appname/shared_prefs/appname.xml
  </code></pre>
  
  <p>I edited corresponding number of coins. But when the game got launched, the amount of coins is not what I want. And I open the xml file again, only found the modify corrected. I tried a lot times.</p>
  
  <p>What should I do?</p>