The 31-year-old wide midfielder was signed from Plymouth Argyle for a then club record fee of £2m in July 2008.
Halmosi found first team opportunities limited at the KC Stadium, making a total of twenty-seven appearances for the club, with only four league starts.
His only goal for City came when he scored the winner in an FA Cup Fifth Round replay win over Sheffield United in February 2009.
Source: BBC Sport
Source: BBC Sport