Microsoft's acquisition of Nokia, which was due to have completed already, has been delayed due to the "regulatory process for approval".

The Redmond firm has received approval for the purchase of Nokia's Devices and Services business from 15 markets on five continents, but still requires more to complete.

The company's legal general counsel and executive vice president, Brad Smith, claims that the work on securing the final approvals in still undergoing and expects to close at some point in April.

"The completion of this acquisition will mark the first step to bring Microsoft and the Nokia Devices and Services business together," said Smith on a Microsoft blog.

"We remain as excited as ever to welcome the Nokia Devices and Services business officially as part of the Microsoft family."

Former CEO of Nokia, Stephen Elop, will be taking his role as head of Microsoft's Devices and Studios division when the acquisition is finally finished and that means he will also be in charge of Xbox.