So intsead of going to someone elses place, can I plug it in at my place and get TPG to perform diagnostics at their end?  I'm happy if you run a network trace and send me the pcap file and I will try and look at it from my end. ... View more

I have exactly the same problem. AC1200 modem was working fine up until a couple of months ago and then just stopped connecting one night. I have tried factory reset, new Cat 6 cable, using the MAC Address of the Huawei Gateway, but all to no avail.   While the Huawei Gateway works, the Wi-Fi is extremely flaky. Common problem is having to reconnect and getting No Internet, Secured status. The Wi-Fi on my AC1200 was faultless when it was working.   It's like TPG has just hobbled these devices. None of the advice so far has added any value. Will be looking for a new ISP soon. ... View more

I have the same problem. D6220 worked fine up until a week ago and then just stopped. I can connect the TPG supplied Huawei router and it works fine.   I tried a factory reset on the Netgear, but still no joy. The logs on the device are next to useless, so not much help in troubleshooting. I haven't contacted TPG yet, but by the sounds of your expereince, it won't help much.   I am going to keep experimenting, so if I find something that works, I'll let you know. ... View more