Play store - Wishlist server error DF-DFERH-01 - ZTE Blade III
First you have to go to Settings > Applications > Manage applications
  Once here you go to the "All" tab.
  Seek the Google Play Store app and press "Clear Data" button.
  Then look for "Google Services Framework" or "Google Service Framework" application and do the same.
  Then restart the phone, wait a minute and ready.
  
  
  I hope they work.


http://wikitechsolutions.com/6496/how-to-solve-the-df-dferh-01-error-when-you-are-into-google-play