Very simple to use, the Philex TriStar 4G filter simply connects between the aerial and the digital box or TV and removes any interference from the 4G mobile phone network. This particular filter has push in coaxial connections.
Not everyone will be affected by this, usually those affected will be in areas where 4G is on certain airwaves (the 800MHz band). In those cases there might be interference with Freeview reception. If you are affected a 4G filter is the easy answer.