By the way, I dont know why anyone has troubles with the Netcomm NF4V wireless.
I have had several wireless routers here HG659, D-Link DIR-825 and various others, none have approached the NF4V in its ability to punch through the walls and cover the house with a decent 2.4Ghz signal. As for the dual band, Ive found that 5Ghz coverage much worse in our modern home than 2Ghz, so the second band is no issue, albeit throughput is meant to be over double the lower band.
I was surprised that the DIR-825 which has external aerials and supposedly higher power is weaker than the NF4V which has Im guessing PCB tracks as aerials.