Around 40% of online sales now come from mobile and tablet devices, according to the latest figures from the IMRG Capgemini e-Retail Sales Index.
The tracker revealed a spike in m-commerce activity over the three months to the end of January 2015, rising at the sharpest rate since the same period last year when mobile accounted for 32% of online sales.
The figure is higher than in the previous quarter, when Black Friday and Christmas shopping drove mobile and tablet sales up to 37%.
Smartphones were used for 25% of mobile sales, with the other 75% made via tablets. However, Capgemini retail director Adgild Hop said: “With ever-expanding screens, and increasingly ubiquitous connectivity, I don’t think it will be too long before smartphones overtake tablets as the prominent mobile shopping device.”