advice setting up tp link n600 dual band router

[#1]

hi just brought the tp link n600 dual band router as the wifi signal is poor on the original router
is it the case of plug and play or is there more do it?
thanks in advance

[#2]

It isn't Plug and Pray
These are the settings http://www.plus.net/support/broadband/hardware/broadband-connection-settings.shtml#fibreConnectionSe...