First of all we will need a few things:

1. A serial cable that looks like this - you can get these anywhere online ebay,mobilefun.co.uk.
2. A 9V battery its the one that goes in your smoke alarm
3. Software which is called Samsung D500 Corona Downloader get it here
4. D500XAEB1 Flash file get it here

Step 1: Connect 9v Battery to Cable, must be a brand new battery as this process takes approximate 90 min, and if the battery fails you WILL kill your phone.

Step 2: Power off the phone with no sim inserted and connect phone to cable and cable to PC.

Step 3: Select correct com port, com speed should be 115200.

Step 4: Now press the start button at the top of the program to identify the FLASH ID

Step 5: select the BIN + TFS radio button then.

press the BIN button and open the "D500XAEB1.cla" file.

press the TFS button and open the "D500XAEB1.tfs" file.

Step: 6 Click Start power the phone on when prompted phone will connect, and the "Download" button will now be highlighted click the download button and the flash will begin.

Note: the entire flashing process takes approximate 90 min.

Once flash has finished, press stop

Phone successfully flashed enjoy a nice clean faster samsung phone :)