I have about five phones that have the same problem not getting an IP from the DHCP server.
I have about 20+ phones that are working and operational. I can unplug them and plug them back and they'll work.
for the not working phones, they seem to stuck at the "Configuring IP" message stage.
I have tried "erased" "restore" and "default" options on the phone.
Select "Settings" (the check mark button on the phone pad) then "Model Information" and then Load File.