I just purchased a Netgear d6400 and I'm quite disappointed.
My config: TalkTalk 38MB fibre (FTTC), MacBook Pro (2010), iPhone 6.
I previously had a Belkin ASDL (pre fibre), then the supplied TalkTalk Super Router (post fibre).
Download speed is OK (37MB) only if I'm next to the router. As soon as I go further away the speed drops immensely (even in clear line of sight).
To the extent that I cannot longer surf from the garden. The garden is around 8 meters away from the Netgear router. The other modems/routers did cope just well, a lot better. I was able to surf from the fence (of the garden) which is a lot further out.
I tested both 2.4 and 5GHz, both have the same issue.
Tried firmware update but no updates available. The thing is I don't have time to tinker with this kit, it should work as advertised. AC1300? no way, I can barely do 5MB at 8 meters away (but goes 100% fine when am next to the router). How can a £149 modem router work so badly out of the box?
Any help is greatly appreciated...