After the Digital TV Restack in 2013 all TV Channels above 52 were moved below 52 to make way for the Transmission of new Mobile Phone Signals that support the use of fast broadband internet on Mobile Devices. Because older TV Antennas and Amplifiers were made to pass TV Channels up to 69, the new 4G Mobile Phone Signals come in causing Overloading of Mast Head Amplifiers and TV Tuners. Interference from 4G Mobile Phone Signals is one of the most common types of Interference to Digital TV Signals and the latest Antennas and Amplifiers from Australian Suppliers have built in 4G filters now that attenuate these signals but some have better Filtering than others. In some areas this Interference is very strong and requires very high rejection filters to knock it out and in extreme cases may require double filtering. We have extensive experience Fixing 4G Mobile Phone Interference, testing all the makes and models of filtered Amplifiers and Antennas using only the Models with the Highest Rejection Filters.