Micro B USB data cable

[KW]

Im trying to make a cable for my phone and would like to know what wire on the usb input from the computer go to the phone. I have looked all over your site but cant find info for my phone. I have the LG MT310 phone by metro pcs.There are only 2 wires that come from the micro b usb connector and 4 from the usb. I know the charging is red to and black to black but my computer wont recognise it unless its wired for data. Thankyou for any help