All About Microsoft reports that Nokia filed on March 11 a form 20-F with the Securities and Exchange Commission which mentions a number of new tidbits about Nokia's smartphone-centric partnership with Microsoft.

The document confirms that Microsoft and Nokia still haven’t finalized the deal, announced in February, noting the pair has “entered into a non­binding term sheet… (while) the planned partnership with Microsoft remains subject to negotiation and execution of definitive agreements by the parties.”

There’s been some debate as to whether Nokia will be fielding its first Windows Phone 7 devices in 2011 or 2012.

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