One example is the dedicated camera key on the right - hand side, which launches the relevant app even when the device is locked. (thenextweb.com)
The 2 - step camera key is located slightly lower and has the same look. (brighthand.com)
A dedicated camera key on the side of the phone also allows instant access to picture taking, click once for the camera to be activated and another time to take the shot. (consumer.huawei.com)