I have the same problem, spent over half an hour on the phone with TPG support on 12/3/20 with no success, tried a friends Xbox at my place and it relocated the issue. All other devices are fine. Given there are now several reports of exactly the same issue by TPG users in this forum when will TPG investigate and resolve this as it is clearly something that they have done which has made Xbox unusable. And Xbox is hardly a rare device for customers to be using on their service.
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