Nokia Corp. moved to counter perceptions that Microsoft Corp. got the better of the alliance unveiled Friday, stating that the Finnish company will receive billions of dollars in financial support from the U.S. software giant to help develop and market smartphones using Microsoft's operating system.

Stephen Elop, Nokia's chief executive, on Sunday disclosed the Microsoft payments and other benefits Nokia will receive as a result of the deal between the two companies, under which Nokia will adopt Windows Phone as its main smartphone operating system.

Although Nokia will pay Microsoft an undisclosed royalty for licensing the Windows Phone software for Nokia handsets, Mr. Elop, during an interview, said Nokia will see "very substantial reductions" in operating expenses, including from layoffs, because it will no longer need to spend as much to develop mobile software on its own.

The Finnish phone maker's shares fell 14% in Helsinki on Friday, in part because of investor disappointment that Mr. Elop didn't announce big cuts to Nokia's research spending.