On 18 December 2007, Quincy was called up by Ghana as part of the 40-man squad for their two-week training camp in Dubai ahead of the 2008 African Cup of Nations. He later told Spanish media that he was very happy to receive the call-up. On 10 January 2008, FIFA approved Quincy's request to switch to Ghanahis teammates threw water over him in celebrationand he was duly selected for Ghana's 2008 African Cup of Nations squad. He was a member of the team that defeated Nigeria on 3 February to advance to the semi-finals, and scored his first international goal in the third-place match of the 2008 African Cup of Nations, in which Ghana defeated Ivory Coast 4–2.