Wesley's Tool-Box

If you buy a phone with camera function in Korea, you'll notice that taking a photo will produce a shutter sound even if you set the phone to vibrate or silent mode. This is because of a government recommendation set in 2004 to have phones always make a sound louder than 65dB when a photo is taken, to curb spy shots and boost privacy.

iPhones are no exception, and if you buy one in Korea, the silent mode switch does nothing to, uh, silence the shutter sound. This is interesting because iPhones are generally not differentiated except for slight variation in CDMA or LTE support.

(ADDENDUM: The situation seems to be the same for the iPhones bought in Japan or the Philippines.)

The question, then, would be if this shutter sound is controlled on a carrier / region basis or device basis. If it's controlled by detecting what carrier or region it's being used, then taking the phone outside Korea would silence the shutter sound. If it's preconfigured on the device, whether or not the sound will persist would depend on where you originally bought it from. So which is it?

If you're playing Simpsons: Tapped Out game (iOS / Android) on your spare time like me, and also happened to be a developer that upgraded your phone to iOS 7 (beta 1), then you may encounter a bizarre bug where you automatically get login to a completely random, but different account.

Some leafing through the web yielded some clues on what was likely going on. It seems to be caused by the way EA implemented the device and account management.

Apparently, EA decided to keep session information of both the device and the account that it's logged in on the server. When a user exits the game and comes back, the game checks the device and automatically login to the account it was last associated with. Seems harmless, right?