Hello Everyone fyi.. this is my first drone, and a newb at this. I am looking for clarification on the purpose of the MicroUSB port on the back of my controller. I see in videos you are to plug it into your phone/tablet. I can not because the cable shipped with is incorrect. I have searched the forums/goole for answer and can not find anything solid. I am seeing multiple answers. - it's for calibration - videolink to drone - the port is not supported and can not be used on the P3 4k model (then why is it there) I am hoping someone who has a 4k version knows exactly what the port is for and if it's needed or can be used.