Since iOS 6 will not activate Siri on iPhone 4 free, would you be willing to buy it? Siri worked on iPhone 4 before Apple bought it and made it exclusive to iPhone 4S. True the 4S SoaC has advanced audio processors, but that did not stop Siri on older phones. iPad 2 uses same SoaC as iPhone 4, so likely can manage just as well. I would buy Siri if Apple sells.