Instant Compose cydia tweak reuses the ringer/mute switch which is not so frequently used, to get a full advantage of every part of your iDevice.
Ever wanted to post something real quick on either Twitter/Facebook/iMessage or Email without opening to their app and posting? That might take some time and it may be annoying.
Now you can compose super easily and fast, just by flicking the ringer/mute switch.
Note: This tweak does not replace the main function of the switch, so you still able to set your device on ringer/mute.
You can Enable/Disable the tweak from it’s settings in the settings.app.