Siri doesn’t just reside on your phone; it actually gets information and personality from Apple’s data centers, like the one they built in North Carolina. Requests are processed and sent back, so network issues, server problems, or just trying to use it in an area with poor wireless coverage can cause problems.
This isn’t the first time Siri has had trouble showing up for work – there have been several smaller outage and at least one large-scale U.S. failure of service in the past. Apple generally doesn’t comment on Siri work stoppages, although consumer representatives have indicated that local network failures could be responsible for some of the problems seen today.
Anyone having problems with their digital assistant?
source: Electric Pig