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at800 trial of 4G at 800 MHz in Brighton

at800 is holding an extended trial to help understand the extent to which 4G at 800 MHz could disrupt Freeview.* The trial begins in Brighton from mid-May. at800 is the organisation tasked with ensuring viewers continue to receive Freeview when 4G mobile services at 800 MHz are launched later this year.

Brighton has been selected for the trial as Freeview in the city is transmitted on frequencies that are particularly close to the 800 MHz frequencies used for new 4G services. The trial will also be the first time at800 provides specific support to the elderly or those with a disability.** Depending on the trial outcome, a decision will be made on whether the 4G masts will remain active indefinitely.

Simon Beresford-Wylie, chief executive of at800, said, “The hilly terrain in Brighton – which can affect TV signals – coupled with Freeview being transmitted on frequencies very close to 4G at 800 MHz will make this a very useful trial. We urge viewers in Brighton to call us should they see any new problems with their Freeview reception.”

Approximately 80,000 addresses in Brighton are being sent a postcard explaining that 4G will be activated in their area. Of these, 2,424 households will also be sent an at800 filter before the trial begins. This connects between the existing TV aerial cable and the television or Freeview box and is designed to block 4G at 800 MHz. If viewers have an amplifier or signal booster, the filter needs to be connected between the antenna and the amplifier. at800 believes most people will be able to fit the filter themselves; however, additional support is available to the elderly or people with a disability via a home visit service.

For residents in buildings with a communal aerial system – where the antenna or aerial is not their responsibility – at800 will provide the landlord or property manager with a free communal filter on request.

If viewers are having difficulty fitting the filter, or would like more information, they can visit or call us on 0333 31 31 800.

If viewers have not been contacted directly through the post by at800, problems with their Freeview service are unlikely to be due to the 4G trials. Television received via a cable or satellite service is not expected to be affected. Only new 4G services at 800 MHz could cause problems with Freeview; existing 4G services from EE operate at 1800 MHz and do not disrupt television.
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Download a PDF copy of this release – at800 trial of 4G at 800 MHz in Brighton

About at800
at800 is the consumer brand of Digital Mobile Spectrum Limited (DMSL), the organisation responsible for ensuring people continue to receive free-to-air television when 4G mobile services operating at 800 MHz are launched. The organisation is funded by the UK mobile operators with 800 MHz spectrum allocations to provide 4G services – EE, Telefónica UK (O2), Three and Vodafone.

*4G enables mobile devices such as smartphones, laptops and tablet PCs to access the internet at super-fast speeds and is expected to bring innovations in business, entertainment, education and public services. 4G mobile services at 800 MHz and digital TV operate in adjacent parts of the radio spectrum. Equipment that receives television signals, such as aerials, amplifiers and digital tuners, can fail to block 4G at 800 MHz. This can cause loss of sound, blocky images or loss of some or all Freeview channels. Freeview is the television that viewers receive through their aerial. BT Vision, YouView, TalkTalk and Top Up TV also provide Freeview services. Satellite and cable TV services are unlikely to be affected by 4G at 800 MHz.

at800 will contact those households it predicts may be affected by this issue before 4G at 800 MHz is switched on in their area. It will also contact businesses, social housing departments, care homes, hospitals, schools and colleges to advise what action needs to be taken.

**As part of its commitment to the issue, £20 million of at800’s funding is set aside to provide additional support to the elderly and those with a disability. This includes managing arrangements for a home visit service, with local people available to help fit free at800 filters that are designed to block 4G at 800 MHz, and address any issues with Freeview caused by the rollout.

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