Normally, this plan is priced at $60 per month on the Public Mobile website. New customers can also sign up for this $40/15GB plan (use code 2EL9RO for a $10 bill credit), which is shown as a plan choice when you’re activating your SIM card.
You can find this plan by going to your account and clicking ‘Plans & Add-Ons’, then ‘Change My Plan’. Then click on ‘4G Speed’ and scroll down and you’ll see the $40/15GB plan option. You have the option to change to the plan now (but you won’t get a pro-rated refund) or at your next renewal date.