The idea "Lock Screen" is a supplement to "Flip Phone".
English version: 06/29/2015, German version: 08/31/2014
Hardware additions that allow simple, fast and above all reliable functions relating to privacy, tracking and battery drain, that can be switched on and off, protect the display and avoid the switches from accidental operation.
Smartphones disclose their position constantly and almost exactly via mobile network and WiFi. By injection of malicious software microphones and cameras can be tapped. Some devices allegedly even when they are turned off. Only removing the battery is said to help. However, with many devices the battery is not removeable.
If you want to have more control over when and where the functions of the device should be used deliberately or rather be disabled, you have bad luck with conventional devices. Although Wi-Fi and "Mobile data" can be turned off via the settings menu or via a widget, you can not switch off the battery (electrically isolated, as if it were removed), the SIM card (as if it were removed) and the microphone (also electrically isolated).
A hinged lid, that – based on the model of conventional flip phones – has its hinge on the top edge. It covers the entire touch screen and it provides space on the inside for slide switches for battery, SIM card, Mobile Data, WiFi and microphone. Furthermore, all cameras (not shown in the picture) are equipped with sliding covers.
It would be ideal, of course, to create the device by using open source software and open source hardware.