"Sony Ericsson is a vital part of Ericsson. We have an ambition of turning it around, we have done it before and we will do it again," Michael Treschow told Reuters in an interview.

"We want Sony Ericsson to return to profitability and make it a successful venture," he said, adding that he wanted to return the joint venture with Japan's Sony Corp to return to the "good profitability" levels it had in 2007.