Update: powering old phone used for tethered internet access.
Step 1: Gather Parts
USB hub: http://pages.ebay.com/link/?nav=item.view&id=151854967357&alt=web
Micro USB breakout: http://www.banggood.com/50Pcs-CJMCU-Micro-USB-Interface-Board-Power-Switch-Interface-p-997115.html
Step 2: Open and Detach Port
To open the USB hub you need to "rip out" the end cap without a USB port in it.
Once loose you may gently remove the plastic casing containing the circuit board from the metal casing. You might need to help it out by bending the ports downwards to pass the openings in the metal.
Carefully cut away the plastic covering the ports.
Desolder one of the ports.
Step 3: Solder the Micro USB Breakout to the Hub
Solder the wires to the vcc and gnd pads on the hub. I had to cross the cables to align the pads. Glue the breakout to the plastic casing and reassemble.