My roommate and I both got the 4S today; he's on AT&T and I'm on Verizon. My Siri has not worked once for me today; either she doesn't understand what I'm saying or simply "having trouble connecting to the network." We're on the same wireless network. The Siri on my roommate's iPhone 4S is working fine. All the other internet and wireless and messaging functions seem to be working fine. Any insight into whether it's carrier dependent? Anyone else on Verizon having this issue?