Sometimes 4G mobile broadband services can interfere with TV signals in some areas.
A company called at800 has been established by mobile phone operators to help resolve these reception issues for Freeview users. You can use its handy tool to check if there's 4G interference in your area. It shouldn't take more than five minutes to complete.
How to block 4G signals
If there is 4G interference, this can usually be resolved by fitting a simple 4G filter between your aerial cable and your TV. This is a small box that blocks 4G signals so you can carry on watching Freeview as normal.
You can get a free one from at800; see its 4G filters guide for more information, or call its support team on 0808 131 3800.