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Various embodiments for the automatic detection of the presence of a protective case on an electronic device are provided herein. Generally, the electronic device includes one or more sensors; a device memory storing an application; a device processor, which upon execution of the application, is configured to: monitor, via at least one first sensor, a trigger condition for detecting the presence of the protective case; detect the trigger condition; in response to detecting the trigger condition, cause the electronic device to vibrate for a pre-determined period of time; collect, via at least one second sensor, sensor data during the pre-determined time; extract at least one feature from the sensor data; based on the extracted at least one feature, determine whether the protective case is applied to the electronic device; and generate an output indicating whether the protective case is applied to the electronic device.