On August 30, 2007, the Houston Chronicle reported that KIOL would be switching to the Jack FM format at 10:37 a.m. the following day, and adopting new call letters, KHJK Jack FM to make Houston debut.
On August 30, 2007, the Houston Chronicle stated that KIOL would be changing formats to the well-known Jack FM brand at 10:37 a.m. the following day, and would also receive new call letters, KHJK Jack FM, as it made its initial appearance in Houston.