Have you downloaded the Blackberry Messenger for iPhone ?. Yes, I know , it has been pulled back from App Store after the issue of leak of unreleased version of the software on the Android system. Up to this article written, checking on App Store , BBM is currently not available .
So now the some test. In spite I know that the service may be still unstable, since the first time using BBM for iPhone, I am experiencing delay between the notification and the chat screen. Notification saying the chat is arrive, but further check on chat screen, nothing in there, until few minutes.
The problems still in the air, well I hope they sort it out very soon. I think Blackberry just underestimated how big this would be until the problems occurred. Luckily the issues have not impacted the BBM service for Blackberry. For further information , please follow @BBM on Twitter for the latest updates and go to www.BBM.com to sign-up for updates about BBM for Android and iPhone.