What is BBM? Basically BBM (Blackberry Messenger) is an enhanced real-time text messaging service between Blackberry users. It also includes media sharing besides text messaging. The messages are relayed through Blackberry's RIM servers, very similar to email, so it can make the most of Blackberry's other famous proprietary system, push technology. But recently they had made it cross platorm, so it is available for both iOS and Android.
