Faster mobile internet is set to bring a mid Norfolk market town up to speed.

New fourth generation mobile services, known as 4G, have been switched on in Dereham.

This gives people faster access to the internet on smartphones and tablets.

However, there is a small chance that some 4G mobile signals will cause interference to Freeview.

This could include loss of sound, pictures going blocky, freezing or the TV screen going blank or showing a 'No Signal' message.

Free support is available to fix the problems.

Established under government direction, the company at800 offers free support to households that rely on Freeview for their television to resolve 4G related interference problems.

The company also offers extra support for the elderly and those who receive disability premiums.

Ben Roome, CEO of at800, said: 'We want to ensure that people know it's our role to fix Freeview interference caused by 4G at 800 MHz, and that there's no charge for our service.

'If you rely on Freeview for TV, we can arrange for one of our accredited engineers to visit homes to fix Freeview interference caused by 4G signals, free of charge. If you use Freeview alongside other TV services, we can send free filters which block mobile signals that are easy to fit to the aerial lead connecting to TVs and set-top boxes.'

Cable and satellite TV won't be affected.

However, if viewers have cable and satellite TV and also watch Freeview, at800 can provide free filters and advice, but not in-home engineer support.

Extra support is offered for people aged 75 or older, registered blind or partially sighted or who receive personal independence payments (PIPs); attendance allowance; constant attendance allowance or War Pensioner's Mobility Support.

Anyone who experiences new interference to Freeview should contact at800 free on: 0808 13 13 800 or go to www.at800.tv/contact-us

Elsewhere, O2 has announced it is expanding its 4G service to Shipdham as well as improving its 2G and 3G network.

Work is scheduled to start on August 7 and, subject to successful implementation and testing, customers will see the new and improved service in the following weeks.