This is primarily suggested to benefit the OS in emerging markets.
In a recent press release John Sims, President, Global Enterprise Solutions at BlackBerry said,
“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,”
Bryan Biniak, Vice President and GM of Developer Relations, Nokia Corporation added,
“Today marks an exciting moment for Nokia. By bringing BBM to the Windows Phone and Nokia X communities, our customers will be able to experience this popular global messaging app.”
BBM will be available as a free download for Windows Phone users this summer.