How to get rid of the shutter sound on a japanese Pixel?
I bought a used Pixel 8 in Europe, installed CalyxOS and unfortunately it makes shutter sound that cannot be disabled. As I found out, this is a specificity of the Japanese models. It is not mandatory in Europe and a real annoyance, for instance when taking a photo in quite environments, like during a conference, a wedding, etc.
The model name is GZPF0:
$ adb shell getprop ro.oem.key1GZPF0
Some people claim that it depends on the SIM card. I have an European SIM card. I tried to disable it, but it does not make a difference. My understanding is that the non-Japanese models make shutter sounds when used in Japan (e.g. with a Japanese SIM), but if the model itself is Japanese, it will always do.
Both Aperture and the Google Photo apps are impacted.
I read that it might be possible to overwrite the model name by using a patched image or by rooting the device, but I get that this will not survive updates.
How is this "feature" implemented? What components are involved? (Apps, OS, Firmware...)?
Is there a way to get rid of it?