The retailing group comprises Carphone Warehouse, Currys and PC World. It expects to report pre-tax profits between £355m and £375m, at least £1m higher than analyst predictions.
Sebastian James, the group’s chief executive, described Christmas trading as a "strange shape" and "something of a roller-coaster".
He said online sales growth was up, driven by increases in demand for home delivery and click-and-collect services, and that prepay phones sales had continued to fall, replaced by "postpay" contracts "to a large extent".
While laptop sales were on the up, he said demand for tablets "fell sharply, as we saw less innovation in the category". Ultra-high-definition TVs are growing in popularity and white goods had a "very good peak trading period."
The group said it grew its UK, Ireland Nordics and Greece market share in electrical goods and mobile during the nine weeks ending 3 January, while gross margins were stable.
James said: "There is no doubt that the huge scale and success of our Black Friday promotion impacted the three weeks that followed, but it was good to see customers respond positively to the deals that we had on Boxing Day where we saw growth from our record-breaking numbers last year in both the UK and Nordics."