Can you inform me if the Home Phone prepayment amount required to become "financial" is a one-off which decreases as calls are made (thus requiring a top-up when necessary) or a recurring monthly cost even if no calls are actually made? Thank you.
The prepayment covers calls not included in whatever voice plan you have, eg. $0 PAYG plan has no included calls. It is topped up when it falls below some value. The $10 and $20 per month plans have included calls, but not for all possible calls. See the TPG website.