said by jsb825:
I never used more than 5 mb when I had a blackberry and I got loads of e-mail messages. So Apple explain yourself!! Please!
With Blackberry, checks for new e-mail are done by the BIS or BES server, and only when there is something new in the mailbox is the phone notified. While this push behavior is done with certain e-mail providers on certain platforms (like gmail on Android phones), with Blackberries it applies to any e-mail source you use. Along with data compression, this is one of the main selling points for Blackberry.