I have to say that the BlackBerry OS has less lag than the other smartphone OS’s but in some regards it is underpowered. It seems that RIM has taken this to heart and released a Knowledgebase article on how to optimize your BlackBerry so that it performs at the best of its capablity. Check out RIM’s advice on how to keep your flash memory available and how to maximize your battery life. The most interesting part of the Very long FAQ is the following table listing how much space each item on your BlackBerry takes. :
| Optional application | Approximate space required* | Approximate number of equivalent messages* |
| BlackBerry Attachment Service | 120 KB | 120 messages |
| Help | 65 KB per installed language | 65 messages per installed language |
| Instant Messenger applications | 350-400 KB per application | 350-400 KB per application |
| Language Support | 100-120 KB + per language | 100-120 KB + per language |
| BlackBerry® Maps | 500-1000 KB | 350 messages |
| MemoPad | 10 KB | 10 messages |
| Password Keeper | 25 KB | 25 messages |
| Tasks | 25 KB | 25 messages |
