I did some calculations using M1's mySim only plans vs Regular plan
$20 a month vs $62 a month for a 4gb plan
over 2 years it's
$480 vs $1488
paid for the subscription
Iphone 7 plus 32gb for me
$1248 vs $680 estimated M1 price, based on Australia's price rising by $140aud
So total spent over two years
$1726 vs $2168
$442 difference. Going sim only seems to be a much better deal. It can potentially be $542 difference. Because when I click on mYsim to subscribe, it allows me to buy the iPhone 6s for $100 off the retail price. Which would bring the total spent down to $1626.