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.
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