Earlier quoted context omitted.
I thought that blackberries had their own network? Wasn't there was a big outage for blackberries awhile back that didn't affect other smartphones?
Kindof...blackberries proxy all of their web traffic through RIM. One of the reasons (I think) why they do this is so that they can compress images.
They're also pretty censorious. Needless-to-say, the likes of 4chan and porn are blocked on Vodafone's cellular network. But so are Flickr, Meebo, Google Talk and a whole host of other inoffensive yet useful websites. All redirect to a page telling you that they're barred by "content control".
Why can cellular operators get away with blocking stuff that other ISPs would never dream of filtering out? Why should it be any different whether I'm accessing the net through my Vodafone dongle or my ADSL line?