eBay is calling for improvements mobile broadband coverage, as its claims mobile commerce "not spots" have resulted in £1.3bn in lost sales.

Research by the online auction site, which conducted by Verdict, revealed 16 percent of the UK is a m-commerce 'not-spot' and in these areas spending from mobile phones is 20 percent lower than the average for the UK.

Rural areas of the UK and Wales, along with the Scottish highlands were among the worst-affected areas.

Furthermore, more than a third of consumers have failed to complete a mobile transaction. eBay said mobile broadband speeds, coverage and reliability of connections were in factors there were stopping consumers purchasing from their handsets.

"Mobile shopping represents a massive opportunity not just for retailers, but for the economy as a whole," said Angus McCarey, UK retail director for eBay UK.

"But our research shows that consumers and retailers are missing out as the cost and reliability of mobile broadband prevents shoppers from spending."

The online auction sites believes mobile shopping will boost the UK's economy by £4.5bn by 2016 and by £13bn by 2021.

"High quality and reliable mobile broadband coverage throughout the UK has to be our ambition, giving consumers choice over when and how they shop, encouraging spending, thereby benefiting online and high street retail, and giving a much needed boost to the fragile economic recovery."