A mobile device having a user input component receiving input from a user and a biometric sensor incorporated in the user input component collecting biometric data from the user when the user input component is receiving the input, wherein the input is non-biometric data. The switch includes a switch body having a port aperture therein in communication with one of the ports of the microphone, and a switch actuator moveably connected to the switch body and moveable to a first position wherein the port aperture is generally unobstructed by the actuator and a second position wherein the actuator covers the port aperture. The retaining ring is formed from a wire, which can be inserted essentially tangentially into the annular channel through an opening arranged in the inner part or in the spring support part and opening into the annular channel. Once the porous layer is functionalized, one may immobilize probe molecules on or within the porous layer to create a microarray having a greater probe concentration and retention capability than conventional non-porous inorganic substrates, without suffering relatively high levels of auto-fluorescence and other detriments common to un-tinted porous substrates. Accordingly, after insertion of the heating material in the nip starts, control temperature of the heating member is increased before the rotary member rotates by one revolution, thereby preventing an uneven heating phenomenon of the heating material in the first revolution and the second revolution or later, and preventing uneven gloss due to the uneven heating phenomenon in the fixing apparatus. The solenoid is configured to controllably draw the magnet into the gap in a first state and to controllably repel the magnet from the gap in a second state.