Jailbreaking iOS device has many advantages, for example, you can install useful tweaks from Cydia and add more features and functionality to your iDevice. These tweaks work magically, they can add features that are not possible by using Apple's App Store. One such new useful jailbreak tweak is iOccupied.
iOccupied is a Cydia tweak allows users to have their own auto-responses to incoming calls on iPhone. Basically, it allows users to auto reply using iMessages whenever they are not available.
Once installed, users will need to enable iOccupied from the Settings app. Once enabled, all the incoming calls will be muted, and this tweak will auto-send a message to the caller, with your custom message. The user can choose from many of the pre-defined messages or add a custom one from the customization panel of iOccupied.
The best thing about this jailbreak tweak is that it works with standard voice calls and even with Facetime calls.
iOccupied is compatible with iPhones only, running on iOS 5 or above. This tweak costs $3.99 from the BigBoss repository of Cydia store.