How can I disable the shutter sound on my iPhone 6?

I recently bought an iPhone 6 off of amazon, not realizing it was from Japan. The shutter sound on the camera did not turn off, even with it on silent. I did some research and discovered that Japanese iPhones have the shutter sound permanantely on. Is there any way I can access the files on my phone and disable the file? Also I can't jailbreak my phone.

If you can't or won't jailbreak the phone, NO, there's no way to disable the camera shutter sound on that particular iPhone.

Jailbreak your phone. You CAN do it, you just choose not to.

That's how it's done.

Nope. That's by design (as you know by now).

You can't. Japan doesn't want people making sneak photos, so they require the phones to disable the option to turn off the sound.