The new smartphone, which may be called the Lumia 900, will be built into the same chassis as its predecessor but will feature a bigger screen and may be loaded with a more powerful processor.
The move is an indication that Nokia is not content to rely on its first major smartphone release in years to regain the firm’s place as a major player in the fast-growing handset market.
The former industry leader has slipped behind rivals including Taiwan’s HTC and Korea’s Samsung, as well as Apple’s all-conquering iPhone.
However, it has seen a new lease of life after signing an exclusive deal with Microsoft’s Windows Phone 7 software and announced last week it will make a new push into the US after previously pulling out of the market.
The Lumia 800 has been met with critical acclaim, although the firm is yet to announce sales figures.
Nokia could not be reached for comment last night.