The map revealed that there are still many so-called notspots - including in major towns and cities – where 3G coverage is not available, wireless communications device users may be interested to learn.
"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," Gavin John, chief executive of Epitiro, commented.
"Over 44,000 volunteers from the Shetland Islands to the Isles of Scilly participated with 42 million locations tested from every county in England, Scotland, Wales and Northern Ireland."
He added that, for the first time, consumers have the means to see 3G coverage precisely where they live, work and travel using the map.
Network provider O2 said it "welcomed the crowd sourcing experiment", though the firm observed that more detail would have been useful.
