The BBC 3G crowd sourcing survey into 3G in the UK has shown operators may be exaggerating their claims over coverage.
Operators have often claimed 90 per cent or more of the UK can get 3G, yet the BBC research indicated testers only got signal 75 per cent of the time.
There are still "many not spots," including in major cities, according to the BBC's analysis.
For the first time consumers have the means to see 3G coverage precisely where they live, work and travel.
"The data shows that, overall, people are getting 3G about three quarters of the time, but coverage is nothing like as uniform as the picture painted in the coverage map issued by the mobile operators," said Rory Cellan-Jones, BBC technology correspondent.
"So most of a city will have excellent coverage but there will be certain places even quite near the centre where some if not all the networks are just not providing a data connection."
To find out what coverage is like in your area, head here.
Limited study?
The BBC study was only a snapshot of the UK, as only Android users could take part.
The crowd-sourcing project was also voluntary, as participants had to download an app to take part. Over 44,000 downloaded the application, with 42 million locations tested.
Epitiro, the organisation employed by the BBC to carry out the survey, was pleased with the results, despite the limitations of the Android-only project.
"The BBC has undertaken a crowd-sourcing survey that is well beyond any scale seen by the mobile industry in this country or any other," said Gavin John, chief executive of Epitiro.
"For the first time consumers have the means to see 3G coverage precisely where they live, work and travel."
Stephen Rayment, chief technology officer at wireless networking provider BelAir Networks, was not convinced by the study, saying it would be more useful to garner the whole gamut of connectivity data.
"While it's certainly helpful to gauge the extent of 3G vs. 2G coverage available in the UK, does it really reflect the problems that users are experiencing on mobile networks? Only partly," Rayment said.
"To get a more accurate measurement of the user experience, speed tests along with identifying Wi-Fi availability need to be included. Given that even the new 4G LTE technologies will not be able to handle the current growth rate of mobile data traffic, any study of mobile broadband availability needs to look at measuring capacity as well as coverage."
