noroad:
As an FYI, there is a mesh wireless unit coming soon (this year) for the NF18 that should resolve the wifi penetration issues. The mesh unit(s) can connect via cable or wireless back to the NF18 that acts as a wifi controller.
Its not a penetration issue; the signal is good, its holding ability is where the problem is eg my phone will show a decent signal but no internet, whereas another phone will have connection. If I flip phone 2.8Ghz to 5Ghz then back the connection re-establishes. Its like the phone or TV is at fault but since its only started since the NF18 and NF4V, it would see to be a modem/wifi issue.
Cant try 802.11b defined, as with these there are no settings for specific protocols.