So I need to have a DHCP assigned IP address, but a manual DNS server. I have tried to enter a DNS server in the advanced settings and left the IP address blank, however that doesn't seem to work.
In WiFi settings on the phone (Moto Droid), I went into advanced settings, checked 'Use Static IP' then filled in the DNS server field, but left the others blank. I was hoping that it would get the blank fields automatically.