Issues with Home Hub 3 Wireless. And lousy teleph...

Question

I don't know if this forum is moderated or followed by BT support staff, but I sure hope so.
After coming from Virgn Media for my BB to BT infinity (Awesome speeds btw!) I'm pleased with the connection and, up until today, the support. I now have issues with my Wireless devices on the HH3.
This is the outline of my setup:
I have the Open reach modem connected to the home hub.  I then have the 1Gbps ethernet port from the home hub that is connected to a 1Gbps 5 Port switch that connects my wired network together (Consisting of my Xbox, Networked Printer and my Desktop PC).  Wireless serves 2 Laptops, an Xperia U phone, and a G5 Ipod touch (not all mine, I have a flat mate).
My issue is that when more than one device connects via WiFi, the WiFi network has serious issues: The connections don't drop per se, but websites are not delivered, data transfer is intermittant at best - i.e. the WiFi network simply does not work.  When there is only one device, there is no issue.
Now, being a techie (I don't mean to title drop, but I think it's important that technical support know that I know my stuff) I'm an electrical engineer (The graduate type) and I know my IT - so I have my own idea of what's wrong with this.
Now, as my order was not completed until yesterday, techincal support couldn't/wouldn't help until today.  Yesterday, however, I spent hours trying to solve my issues and got as far semi-solving the problem.  I managed to get everything working nicely together when Wireless N is disabled and only a/b/g is enabled.  Great, but a main selling point is the Wireless N and I want to use this.
So, today I phoned technical support.  I should also note here, and I made this perfectly clear with support, that when the WiFi starts to missbehave, the wired network still works perfectly and I have no issues with internet connectivity with any wired devices.  So, clearly this is not a line fault - it's on this side, aka, the router WiFi side where the problem resides.  Support decided to do a line test anyway - and of course it got the all clear.  He then asked me to reset the router (Yey, again after I had done it plenty of times before, only this time I had customised the SSID and the LAN IP addresses and now they need done again).  He then went on to state that I should receive an e-mail with instructions on what to do next, and if they are still issues to reply to a text message that will be sent.
Duly, an email arrived.  It began with "Sorry you had to call us today about your wireless disconnecting. We’re pleased we could help you get it working again." and continued on with with this theme.  No, my problem is not resolved!  I phoned back, this time advising me to change channels, and check individual devices to see if they're any conflicts - I did this pretty quickly and disabled and re-enabled WiFi on my Laptop, phone, ipod and still to no avail.
I have now been told that I will get a phone call between 3 and 3:30pm to see if the WiFi will settle down. huh!
I don't mean to be such a pain and sound like such a git, but this is not an issue that I believe the technical support (via the call centre anyway) will be able to solve.  This is an issue with the HH3, mine at least, not being able to handle mutiple WiFi devices conntected simualtaneously - all but one on N, the other on G.  Now, I'm of the understanding that this shouldn't be a problem.  I'm sick of telephone support going through their script without listening to the whole issue either or beleiving that I spent a good 2 hours yesterday getting to the bottom of this.  I don't need line tests, I don't need resetting the router, I don't need changing channels - I've did all this!
So it looks as though I'm stuck on HH3 in 'G' for now until we solve this issue.
Further information: I'm using the type A HH3; again wired devices are not impacted in any way from this issue; I have tried multiple different channels; YES! I've reset the router and power cycled it; And this issue happens wether my WiFi devices are 1 meter away from the HH3 or 15 meters away.
Could this be a bad HH3 or frimware issue? Can someone suggest something or highlight something that I've perhaps overlooked or missed?

Answer 1

This is only a customer to custome help forum.
This link may help, although some of the things you may have already tried.
Wireless can prove quite unreliable, and an separate wireless access point can help.
Wireless connection problems
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.