Iphone error
 

having an iphone4 with the version 4.3.1 and i tried to upgrade it recieving the 1013 eror and stucked on recovery mode can downgrade it again how to fix the error 1013 needing a solution thanks its really urgent guys

put it in DFU mode by Redsnow AND TRY TO FLASH IT 4.2.1

Try this solution :
How to Fix Error Code 1013:


Windows:

Step 1. Start –> Programs –> Accessories
Step 2. Run Notepad or WordPad
Step 3. Click “Open..” from File menu.
Step 4. Browse to Windows/System32/drivers/etc
Step 5. In "files of type:" select all documents
Step 6. Open "hosts"
Step 7. Delete all line that has "gs.apple.com" or something like that
Step 8. Hit Save
Step 9. Restore your device

Mac OS X:

Step 1. On your Mac, go to your “Applications” folder.

Step 2. Now navigate to the “Utilities” folder.

Step 3. Launch "Terminal".

Step 4. Type "sudo nano /etc/hosts" (without quotes) and hit return.

Step 5. Enter your password

Step 6. Use the down arrow key to find the “gs.apple.com” entries. Once the cursor is in front, make sure you comment out the line(s) by entering “#” in front of the text.

Step 7. Save the file by pressing CONTROL+O.

Step 8. Exit the nano editor by pressing CONTROL+X.

Step 9. Restore your iDevice.

thanks alott brother ur solution worked regards to all repliers