
The latest news from RIM, maker of the Blackberry wireless email device, says it has <A HREF="http://news.bbc.co.uk/2/hi/business/6568191.stm">restored the service</A> to "most" of its North American users following a network failure. Research In Motion said it was now looking at the cause of the breakdown, which first happened on Tuesday night.
Some US and Canadian users will still experience delays until the backlog of undelivered emails clears, it added.
But with eight million global users, some analysts have questioned whether the network has reached capacity.