Me either. I'm on Wi-fi in Seattle.
I'm pretty disappointed. If this issue is really related to network connectivity, why isn't Apple prepared for this? They had to have known that everyone that bought an iPhone would be trying out Siri.
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Another thought... how does this differ from any other day? Even if millions of people are trying Siri tonight, what's to say that millions won't be using this feature next week? Or two weeks for now?