title: PlayerPrefs not saving on Android/iOS Phone but saving on Unity Editor
body: <p>I am using Unity 5 on iMAC.
  I have faced strange but true unknown issue with player prefs.</p>
  
  <p>Issue :</p>
  
  <p>On Unity Editor -
  I have stored integer value in player prefs that works fine in UnityEditor, and when i restart my game in unityEditor then It was saved and i can retrieve that older saved player prefs's value.  </p>
  
  <p>On Android/iOS Device -
  I have run that same code with device then behaviour will changed.During running game player prefs works fine and i can set and get that value.
  But when i restart the game then i lost that value and can't retrieve that saved value another time.</p>
  
  <p>I am tired to solve that issue, but i can't get success.</p>
  
  <p>Anyone know solution about this unknowing behaviour of player prefs ?</p>
  
  <p>Thank you in advance. </p>