It’s been more than a month after BlackBerry Messenger debuted for the iOS and Android platforms and it is still doing remarkably well on the iPhone. On November 22nd, BBM was a top 5 iOS app for downloads in no fewer than 50 countries, including important markets like South Africa, Nigeria, Argentina, Colombia, the UAE, Canada and the U.K. I think it’s safe bet to say that almost nobody expected BBM to be battling evenly with WhatsApp in their download competition in markets like India and the U.K. at the end of November. Yet BBM has been able to demonstrate uncanny longevity in a variety of Latin American, African, European and Asian iPhone markets. At the same time, BBM’s performance on the Android platform has