Samsung Galaxy S3 Will Not Obtain IP Address

My Samsung Galaxy S3 refuses to retain it’s DHCP assigned IP address. The first post talked about this solution. Set up your phone manually, statically, on your network.
The key was to keep letting the router assign that IP address using DHCP; even when filtering by MAC address is turned off and the phone is set up statically!
Here is how to check the MAC address of your phone: Settings -> WiFi -> Settings -> Advanced.