Households in and around Skegness are being warned that new 4G masts set to bring mobile broadband to the area could disrupt Freeview services.
This is because some 4G signals operate at 800MHz, which is next to the frequencies used by Freeview.
Interference may take the form of loss of sound, blocky images or loss of some or all channels.
Independent organisation at800 is offering free help for those affected when the new masts go live.
Contact at800 on 0333 31 31 800 (included in mobile and landline call packages) or 0808 13 13 800 (free from landlines) or visit www.at800.tv.