It is operated by Celador who bought Original 106 (Solent) from Canwest in August 2008. It replaced The Coast 106 which in turn replaced Original 106 in October 2008, and while initial RAJAR results were encouraging with a healthy increase over those posted by Original, the weekly reach stagnated at around 115,000 by Q1 2011.
Celador rebranded the station as JACK FM, to bring it in line with its sister station in Bristol, also originally broadcasting as Original 106, on 4 July 2011. At the time of the relaunch as JACK fm, all prior presenters were removed from the station, which switched to a format also used by the UK's other JACK stations - a presenter-led breakfast show (hosted by Bam Bam), and automated music at other times. Like all other JACK fm stations, The South's 106 Jack FM runs with a strapline of "Playing What We Want", which does mean that they will not play any requested songs and will only play the music that they want. Former Blake's 7 actor Paul Darrow often records straplines and does voiceovers for Jack FM, and is referred to on the station only as The Voice of Jack.
Following the station's previous launch, Coast 106 made use of a Restricted Service Licence from Ofcom to re-broadcast the station to Guernsey. This was done to promote the station to people of Guernsey for when they travel to the mainland.