If you’re busy working or you’re too lazy to press the power button or tap the button on the screen of your iPhone then turn 2 hangup is the tweak that is perfect for you and will suit you well.
Turn 2 Hangup lets you reject an incoming call just by turning your iPhone upside down. It also has a shake to silence feature which can be used to silent the phone just by shaking it.
This tweak is only for jailbroken iPhones and requires iOS 5 or higher.
Turn 2 Hangup can be easily installed on iPhone through Cydia on jailbroken iPhones.
Although its a simple tweak but it can make your life a bit uncomplicated.
[Bigboss via Cult Of Mac]