I purchased a Nokia 920 SIM free a couple of years ago and it was at the time top of the range. Windows 10 Mobile was launched nearly 6 months ago yet there is still no sign of it being available for the 920. Almost daily I get emails from Microsoft suggesting I buy a new Windows 10 phone. Can anyone think of any good reasons why anyone would want to do this with Microsoft's obvious disdain for existing customers?
There is a Windows 10 Upgrade Advisor available from the Microsoft Store. I haven't tried using it for a while, but your post got me checking and my upgrade is now available and is downloading. Not much help to you, possibly, but thank you for the jolt.
It's complicated, and this isn't the place for a long dissertation on the various business deals that were done.
Essentially, Microsoft did a deal with Nokia in 2014 that involved Using the Nokia brand on Windows phones. Microsoft could only use the Nokia brand to promote Asha, X and Lumia products until December 2015, and feature phones for 10 years.
In fact, Microsoft only used the Nokia branding until October 2014, when it announced that future smartphones would be branded with Microsoft's name and logo.
Two days ago, Microsoft announced that it had sold the Nokia-branded featurephone division to FIH Mobile, a division of Foxconn, and HMD, a new company in Finland. The two will be working together to create Nokia-branded devices. Nokia will be providing brand and patent licensing to HMD, and will take a seat on the board of directors of the company.
Confusing, isn't it? There's more involving Nokia's deals with other companies, but I think that's enough for now.