I have a Lumina phone which I have migrated from Telstra service to TPG provider.  I would like to extend the length of time the phone rings however it appears this is provider specific. Therefore, the Telstra Lumia code to call is **61*101**seconds#  up to 30 seconds rather than the 15 seconds given normally.  Unfortunately TPG does not seem to accept this. The advice page states OPTUS  has a code to dial and VODAPHONE has an online site.  TPG seems to default to VODAPHONE, when I look at the details of my SIM, however I cannot identify where to extend the ringing.  ... View more