If u use hot air soldering station be carefful with microphone, put some tape onit to protect it.
U need to be carefull with pads, not to make short. Otherwise yout phone will not only be no charging but it wont work.
To replace USB connector properly u need microspoce, hot ait station and this soldering iron. Use flux!
To replace USB connect with only soldering iron put a lot of soldering on it and use max heat, then with tweezers remove usb connector, clean wholes and solder new one!