I realise some of this has already been covered in http://www.geekzone.co.nz/forums.asp?forumId=39&topicId=147452.
However, the issue I have is not just with Apple products - it's with our laptop/Android phone and tablet as well.
I changed to VDSL a month or so back. Before then I had a 2Wire router on ADSL2 which I had very few issues with.
With the new HG630b, however, the kindest term I can us about the wifi performance is "sub-optimal".
If I have the device within 4m of the router, it's great. Connection to the PC via LAN cable is superb.
Go to one of the bedrooms less than 15m away, though, and the wifi dies completely. In fact, even in the next "room", which has no wall between it and the router (although it is just around a corner) the wifi keeps dropping out. Not as bad as the bedroom, but very dodgy nonetheless. And the signal seems to fluctuate drastically - standing still, it can vary between up to 3-4 bars to none at all.
It doesn't matter if only one device, or multiple devices, are connected. Same performance.
Now, I have not yet contacted Spark (although I have sent on online request for help, response time 5 days). The concern I have is some previous posters have said they have received replacement routers with no improvement.
So - any tips? Change any of the wifi settings maybe?
Is it worth getting a replacement router?
I'm seriously looking at going back to ADSL2+ with the 2Wire - I am very reliant on wireless, so the benefit of faster VDSL speed is completely negated by the wireless issues.