Photos of new Nokia Windows Phone 8 Lumia smartphones leaked

Leaked photos of two new Windows Phone 8 devices from Nokia, the Lumia 920 and Lumia 820, hit the web at the end of last week, ahead of the handset maker's Nokia World event this week in New York.

Two high-resolution photos popped up on the @evleaks Twitter account, showcasing bright, slick phones which Nokia is expected to debut on Wednesday.

The leaked photos likely display the "Phi" (Lumia 920) and "Arrow" (Lumia 820) devices, both available in a number of colours.

The Lumia 920 phone will supposedly sport a 4.5in display, as well as a PureView camera, which has a 41-megapixel sensor and is meant to eliminate the visual noise found on most smartphone cameras.

It looks like the Lumia 820 (pictured top), comes in at least seven colours and has a 4.3in display.

The mysterious @evleaks has posted only 10 messages so far, including eight photos of an unknown HTC Android tablet, but already has almost over 1,300 followers in less than a week.

Nokia has a lot riding on its Windows Phone 8 offerings and its tight relationship with Microsoft. The beleaguered Finnish handset maker, once a market leader, has struggled to keep up with competitors like Apple and makers of various Android phones in recent years.

"Nokia bet everything on Windows, and if this doesn't succeed the next step might be having to do what's best for shareholders, and that might include selling off key assets or selling the whole company," Canaccord Genuity analyst Michael Walkley said in an interview with Reuters.

Windows Phone 8 isn't expected to drop until 29 October, so if they are revealed in two day's time, the Lumia handsets will still have to sit on the shelf for almost two months before Nokia starts selling them.