Having returned from a couple of weeks in Australia, I've discovered that the wireless performance on my Spark-supplied Technicolour VDSL modem has tanked.

Previous to going away, I was getting wireless speeds of 22-28 down and 9 up on my iPads and Mac Pro, which I was pretty satisfied with. We got home in the wee hours of Saturday morning. Over the weekend I noticed that browsing was very slow, and a speed test on Sunday afternoon showed ADSL speeds of 8 down and 0.7 up. A call to Spark revealed that some shenanigans in our cabinet on Friday had meant we'd been disconnected from our VDSL connection and plugged into someone else's ADSL connection, which explained why our usage meter for Saturday and Sunday was showing 0, despite quite a lot of actual usage.

On Monday morning we were reconnected to the VDSL and a speed test on my iPad reported 24 down and 9 up  - back to normal. However, Monday evening the download speeds were down to 12-14 down, although up remains at 8-9. Tonight I called Spark and they tested the line, and found it was back up to full VDSL speed. They got me to plug my spare laptop into the modem via ethernet cable and I got 35 down, so there's obviously an issue with my wireless which previously didn't exist. It's not feasible for me to cable connect my Mac Pro without removing a few walls, as it's not in the same room as the modem, nor can I move it there. Also the iPads in the house obviously can't be ethernet connected. The wireless performance continues to suck even after a modem reset. I've basically lost about 10mbps in download speed.

As the Technicolour is out of warranty by 2.5 months, I guess I need to buy a new one with better wireless performance to get back to previous download speeds? Can anyone recommend a VDSL model with particularly strong wireless performance? I don't mind spending a few hundred dollars to sort this out. Alternative suggestions also welcomed.