Samsung’s (005930) Galaxy Note “phablet” was a huge success, with cumulative sales having recently topped 10 million units. Though T-Mobile USA just got around to launching the supersized smartphone last month, the sequel has already been unveiled and Samsung has high hopes for it. Speaking with reporters on Friday, Samsung mobile boss JK Shin said sales of the upcoming Galaxy Note II could top 20 million units. “Sales may grow more than two-fold (compared with the previous model),” Shin said according to Yonhap News Agency. The Samsung executive also reportedly said that the Galaxy Note II will launch some time in October.