Almost half of homes and businesses in Aberdeenshire do not have full 4G coverage, according to Ofcom.
Figures from the communications regulator’s Connected Nations report show that in January, 48% of premises in the area did not have reliable superfast broadband coverage from all four mobile phone networks.
Last year, that figure was 68% with Ofcom proposing introducing obligations that require networks to deliver better quality indoor coverage.
An Ofcom spokesman said: “Mobile coverage must improve, particularly in rural communities, and we’re working with the government and the industry to support this.
“We want mobile companies to extend their networks as a priority, and we’ve announced plans to make them increase coverage for rural areas as we release more airwaves next year.”
Ofcom’s report also measures coverage by geographical area for someone using their phone outside.
The figures show 55% of the total area of Aberdeenshire is covered by all four 4G networks.
A spokesman from Mobile UK said: “Huge improvements have been made to mobile coverage in recent years, as a result of the £2 billion invested each year by the industry.”