The handset maker, which is facing multiple tax cases in India, added that the proceedings in the country will not affect the timing of the deal.
Last September, Nokia had announced it would sell a substantial part of its devices and services business, including assets in India, to Microsoft for $7.2 billion by March 2014.
"It now expects the transaction whereby the company will sell substantially all of its D&S business and license its patents to Microsoft to close in April 2014," Nokia said in a statement on Monday.
Nokia and Microsoft remain committed to the transaction, it added.
The two companies have received most of the required regulatory approvals, including clearances from the European Commission and the US Department of Justice, it said.
"However, the transaction is pending approvals from certain antitrust authorities in Asia, which are still conducting their reviews," Nokia said.
The handset giant said it is confident the deal will close, resulting in the sale of substantially all of its D&S business to Microsoft.
"Nokia reiterates that ongoing tax proceedings in India have no bearing on the timing of the closing or the material deal terms of the anticipated transaction between Nokia and Microsoft," the Finnish firm said.
Microsoft said in a statement the completion of the deal will mark the first step to bring Microsoft and the Nokia D&S
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