iPhone 4S users have been able to enjoy conversations with Siri. But owners of older iPhones have no Siri to talk to. Why?
Tearing down the iPhone 4S, the gurus at iFixit believe that Siri's absence on older phones is connected to changes in the proximity sensor used in the new iPhone.
The proximity sensor judges when your face is near the phone so it can dim the display and disable the keyboard. In past model iPhones, it turns on only during a call and then turn offs when the call is completed.
But Siri also makes use of … Read more