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What are filters and how are they fitted?

filterat800 domestic/household filters are small boxes which block 4G at 800 MHz mobile signals and in most cases enable you to carry on receiving watching Freeview as normal – we provide them free of charge. Each filter is smaller than a pack of cards and needs no batteries or external power supply. It will normally plug into the lead between the TV and the aerial. If you have a TV signal amplifier or booster, the filter must be fitted between the aerial and amplifier. We have tested each type of at800 filter to ensure it works correctly in the UK.

You can also download the filter fitting instructions here.


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