A mobile device includes a plurality of sensors; a non-transitory computer readable medium configured to store instructions; and a processor. The processor is configured to execute the instructions for receiving first sensor data from a first sensor; and determining whether the mobile device is outdoors based on the received first sensor data and a first threshold. The processor is configured to execute the instructions for receiving second sensor data from a second sensor, wherein the second sensor is different from the first sensor; and determining whether the mobile device is outdoors based the received second data and a second threshold. The processor is further configured to execute the instructions for determining a confidence level of a determination of whether the mobile device is outdoors based on which sensor of the plurality of sensors is used to determine whether the mobile device is outdoors.