Cell phones have proximity sensors that detect when something like your face is close to the phone. The sensor will turn off the screen to reduce power consumption and disable the touchscreen digitizer to prevent accidental touches. Smartphones have had these sensors for more than a decade and this picture shows that the sensor is doing its job correctly. Only a retard would use this as proof of something being afoot without doing even the slightest bit of work to determine what their own phone does when being used this way.