What is the fine-grained topic of the following text: In July 2014, it had been reported by evleaks that Microsoft was attempting to license the Nokia name in a co-branding scheme, which would have possibly seen future devices branded as "Nokia by Microsoft"
In December 2016, due to continued sales decrease, Microsoft decided to stop selling Lumia phones in the US. Only return the topic.
Microsoft's attempts and decisions related to Nokia and Lumia phone branding and sales.