The Canadian smartphone maker in October last year launched BBM for rival Android- and iOS-based handsets and the app since then has been downloaded on over 40 million such handsets.
"BBM continues to grow in popularity as millions of people use our mobile platform for chatting and connecting with friends or colleagues, and we are very excited that we will soon welcome Windows Phone and Nokia X users to the BBM community," BlackBerry President, Global Enterprise Solutions John Sims said.
BBM will be available as a free download from the Windows Phone Store this summer, while it will be available on Nokia Store when Nokia X platform is launched.
Combining with the existing 60 million active BBM users worldwide, the total BBM base stood at 100 million as of November 30, 2013.
The Canadian handset maker has seen a significant decline in sales over the last few quarters amid stiff competition from smartphone makers like Apple, Samsung and Nokia.
It launched a new operating system BB10 last year but it has
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