An electronic device with a touch-sensitive display, one or more processors, and memory detects a first user input. In response to detecting the first user input, the device displays on the touch-sensitive display a user interface screen including a first affordance and a second affordance. The device detects a second user input including a contact on the touch-sensitive display. In accordance with a determination that the contact corresponds to selection of the first affordance, the electronic device is caused to turn off. In accordance with a determination that the contact corresponds to selection of the second affordance, the device causes initiation of a telephone call to a determined number.