Apple is quite famous in its desire to limit fragmentation among iOS devices. There are only a few models, based on GSM/CDMA and TD-LTE/FDD-LTE. But the iPhone in Japan is special. You cant disable it from making the shutter sound when taking a photo. So my question is: is this implemented in software or hardware? If hardware, how come I dont see a special hardware version? If software, what's to prevent the people from just flashing the US version of iOS if the hardware is all the same?