The Communications Consumer Panel (CCP) has welcomed Ofcom's new paper on mobile broadband coverage across the UK.
Earlier this week, the telecoms watchdog argued in its Mostly Mobile report that large parts of the UK are not covered by operators' 3G broadband networks.
Among the worst-served areas were rural communities in north England, Wales, Scotland and Northern Ireland.
Anna Bradley, chair of the CCP, said that improving mobile broadband coverage must be given a greater priority.
"There are a great many not-spots and areas where the quality of coverage is poor," she said.
"This is reinforced by the coverage maps Ofcom has now published which show substantial gaps in mobile broadband coverage."
Ms Bradley added that being able to use mobile broadband on the move is becoming increasingly important for both "social and work reasons".
The Ofcom study revealed that internet service provider 3 provides the best mobile broadband coverage, followed by Orange in second place.