When did Microsoft officially announce Windows Phone 7?
Windows Phone 7 launched publicly on the 8th of November 2010 in the United States. The operating system was announced earlier that year before its public release.
Questions about Windows Phone
Short answers, pulled from the story.
What date marked the end of life for Windows Phone?
The platform reached end of life on the 14th of January 2020. Active development ceased in 2017 and support ended shortly after.
Which company partnered with Microsoft to make Windows Phone their primary smartphone operating system?
Nokia became the partner that made Windows Phone the primary smartphone operating system for its devices. This partnership was announced by Microsoft CEO Steve Ballmer and Nokia CEO Stephen Elop on the 11th of February 2011 in London.
Why were existing Windows Mobile applications incompatible with Windows Phone 8?
Windows Phone 8 replaced the Windows CE-based architecture with the Windows NT kernel used by PC versions of Windows. This architectural change rendered all existing Windows Phone 7 devices incompatible with the new operating system.
How much money did Microsoft lose when acquiring Nokia's mobile phone division?
Microsoft took a write-off of $7.6 billion on acquired Nokia hardware assets. The acquisition deal was announced on the 2nd of September 2013 and completed after regulatory approval in April 2014.