Google Play error "Error while retrieving information from server [DF-DFERH-01]"

Try this, as it solved in my case on a Samsung mobile phone:

1. Open the "Google Play" app and press the home button to return2. Go to Settings → Applications → Manage Applications3. Select the "ALL" tab, Search for "Google Play Store" and press it to open.4. Press "Force stop"5. Press "Clear cache"6. Press "Clear Data"7. Now Open Play Store and it will work normally.

If the above steps does not help then try the following as well:

1. Go to Settings → Applications → Manage Applications2. Select the "ALL" tab, Search for "Google Services Framework" and press it to open.3. Press "Force stop"4. Press "Clear cache"5. Press "Clear Data"

This is a reported bug with Google: Bug Report. It seems to be related with Google's servers and is very intermittent. IE, you'll notice how all the comments revolve around a few specific days. Haven't been able to fix it myself, but the one comment suggests trying the following:

1. Shutdown your device.
2. Remove your sim card.
3. Turn on your device.
4. Connect your device to a non-local (PR) server, like ATT, TMobile, Spring. If you have a friend ask for a wifi thetering.
5. Open the Play Store.
6. Shutdown and re-install the sim card.
7. Turn on.

It seems this error is only related to the static responses from Google. Using real product IDs don't suffer from this problem.

Update: My answer here is pretty old and the InApp purchase library has changed quite a bit since. Refer to @Ehsan Sajjad answer instead.

It works for me.....

I went to the settings on my phone and deleted my gmail account then re-added and synced the account and it worked for me.

settings>accounts>delete accountsettings>accounts>add account>sync and follow screen prompts

hope it works for you, i was receiving the df-dferh-01 error as well and couldnt buy in app purchases and this did the trick