Multiple questions about the dual screen Xcite XSG2NA-X2DM radio / Nav unit<br/>1) Where is the SD card located for the Navigation Map Update?<br/>2) Where is the Microphone for the Phone Audio? (Everyone says it is hard to hear me)<br/>3) Is there a Software update for the system that makes the Nav Audio Louder? (I am at +10 on the controls and full audio and it is still quire low)<br/><br/>