Critics seemed to be positive towards Nokia's announcement of the Lumia 920 and Lumia 820, even though they lamented the initial lack of release date and pricing details. However, the impending release has not stopped employees from leaving and investors from displaying a lack of confidence.

The Finnish company's VP of Product Marketing, Ilari Nurmi, recently sent an e-mail to Reuters confirming his resignation. Neither Nurmi nor Nokia have commented on the reasons for his departure from the company.

"lari Nurmi, who was vice president of product marketing and responsible for the company's smartphone strategy, confirmed to Reuters in an email that he recently left the Finnish phone company," stated Reuters.

Nurmi was employed at Nokia, and involved in, the announcement of the Lumia 920 smartphone. The features and design of the high-end phone were praised, and the device was touted to be a strong competitor for existing Android smartphones and the iPhone. However, at the time of the announcement, investors had expressed disappointment since Nokia had opted to not disclose the launch date and price details.

Whether investors warm to Lumia 920 and Lumia 820 at release is unknown. Nokia insists that the devices are amongst its most innovative products. Additionally, an employee criticized HTC for copying Lumia designs with HTC 8X and 8S. The design of the former resembles Lumias with the bold, colored bezel and rear design. What's more, the naming of the "flagship" devices became confusing as HTC used the "Windows Phone" branding in the phones' names.

Nokia has sold four million Windows Phone 7 Lumias; however, the number falls short of Apple and Google. The former sold five million iPhone 5's within the first week. Additionally, Google is speculated to unveil a new Nexus device as the current Galaxy Nexus released in 2011. If the conjectures hold true then Windows Phone and its manufacturers will have additional competition to contend with.

Experts also opine that Microsoft needs to get more developers on board. Currently, just 100 apps are submitted per day on Windows Phone, compared to 700 and 600 on iOS and Google, respectively. The launch of Windows 8 could impact Windows Phone 8 positively as developers can simultaneously build apps for the platforms.

Nokia's Lumia 920 will go on sale in November, in time for the holiday season. It remains to be seen if the new smartphones, Lumia 920 and Lumia 820, can give stiff competition to  rivals like HTC, Samsung, and Apple.