Siri is no longer working on my iPhone 4S. Worked fine for the last few months. When I press the main button, I get voice control instead. I didn't do anything (that I'm aware of) that would have triggered this change. Here's what I have tried so far: - Siri no longer appears in settings > general. - Siri does appear under settings > restrictions, but the switch is toggled "off" and cannot be moved (it's grayed out). - I have done a settings reset from the iPhone - I have done a full restore from iTunes (with backup) - My keyboard and language are both set to US English Help! I've exhausted all similar posts on forums without success. Any iPhone wizards with something new that I can try? Thanks!