Not that most of the Owners of Nokia E71 with Symbian S60v3 don't like the fact that Nokia does not provide a feature to take pictures without the camera shutter sound. Nokia E71 allows to change the tone for the camera click. Nokia does this to comply to the rules(even Laws) in some countries that do not allow users to take pictures without informing the subject in the photo.
Method
Download & Install a small App (mute_camera.sis) .(link1) (link2)
Main Thing is the need to sign the App before installing.
Go to Open signed (link) get this file signed. All files need to signed before they can be installed. You need to provide the IMEI of your phone (type *#06# on your screen to get the IMEI), email address (the notifications will be sent on this email address) and upload the file that you downloaded in step 1. Enter the captcha and hit send.
You would get a notification in your email after the file has been accepted. Once the file has been signed you will get a email notification with the download link.
People are getting this Error:
"FAILURE: Submitted .sis file uses a UID that is not in the protected or test range (0x10202be9). Open Signed Online only accepts UIDs from the ranges 0x2xxxxxxx and 0xExxxxxxx."
Alternate Method for Signing the app.
1. Sign Apps using FreeSigner (link)
2. Hack Nokia E71 (link)