The firm in its Mobility Report said when consumers turn to their smartphones to find information quickly, they want an instant response and delay in loading web pages and videos while completing task results in an increase in heart rate and stress level.
It further said that around six seconds delay in video streaming increases stress level three times.
"To put that in context, the stress incurred is equivalent to the anxiety of taking a math test or watching a horror movie alone and greater than the stress experienced by standing at the edge of a virtual cliff," Ericsson said.
It further said global mobile data traffic grew 65 per cent between the fourth quarter of 2014 and fourth quarter 2015 and there are now one billion LTE subscriptions worldwide, with approximately 160 million additions in the fourth quarter of 2015.
The report said 68 million mobile subscriptions were added in the fourth quarter of 2015, India added the most (21 million) followed by China (6 million), the US (5 million), Myanmar (5 million) and Nigeria (3 million).