That was a Special "GTI" Edition of the Samsung S65 who came out during the release of the MK5 GTI in Germany. A lot of German MK5 GTI owners also have a Siemens S65 "GTI". There were made 3000 pieces of them.
That cellphone was a action of Talkline, Volkswagen, Votex and Samsung in may 2005 and there were made 3000 of this limited edition cell phones and they were sold in Germany.