Re: don't have home phone yet optus bills me for $hidden.20 we have NBN free for 3 months
I do believe they deduct the 3 free months off on a monthly basis rather than 3 months without a bill. So if it's 3 months free at say $60 a month then $180 divided by 24 months equals a $7.50 reduction on your bill every month.
Too much coffee for me today, someone check my math 😃
Oh and the reason you got your bill before the services were even provided is explained on the link below.