If you're on iOS 7 and you want to disable Voice Control, then you can use a new free jailbreak tweak called DisableVoiceControl7 by iOS developer tushaoye to completely disable it.

This comes in handy on older devices with dysfunctional Home Buttons where the Home Button might recognize you pressing and holding the button instead of just pressing it to close an application.

On the other hand, if you simply have no use for it, the tweak will come in handy by allowing you to disable it.

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