As an update, an NBN tech was sent to my home the next day and resolved the issue, although it did take him around an hour to do so.  I am happy to now have internet, however please note: - my first call to customer service was left unanswered, after 1 hour and 55 mins on hold - the lodging of this complaint on this forum saw no resolution, even though the moderator said that a fault had been lodged...I had not been contacted and so called customer service again the next day to follow up, and no action towards resolution of the fault had been taken - my second call to customer service was a better result, with the tech actually testing the line to establish that she could see there was no modem response, even though it said the internet connection was active.  At least this call resulted in the NBN tech appointment being set up to come to my home.   So for any other customers trying to resolve a fault, I suggest persisting calling customer service if you are unable to use the app.  TPG's app developers should be aware that many phones' updates have rendered the app inoperable.  At least the second time I called customer service I was only on hold for 8 minutes, not nearly 2 hours!  Don't give up! ... View more