Konami announced the social game last month, explaining:
STAR WARS COLLECTION is a card game that will have players collecting a rich assortment of characters and vehicles, undertaking missions as they travel from planet to planet throughout the Star Wars universe. The game seamlessly captures the signature Star Wars atmosphere as portrayed in the six films, and will feature Darth Vader, Yoda, R2-D2, and many more characters from the series via stunning photos. There are also plans to feature periodic events based on the original films’ storylines.
Konami has rolled out Star Wars Collection on GREE for features phones and smartphones simultaneously a few hours ago.
I just checked, and the game is already in the list of titles recommended by GREE (in a special section on the platform).
Star Wars Collection on feature phones:
Star Wars Collection on the iPhone: