View the pricing page
and use the data estimation tool. Choose "Premium plan" when using the estimator to view the correct pricing.
If you're a current customer, you can choose to upgrade to the premium service, or simply continue with your service as normal. Your current plan will be renamed, however you'll lose none of the functionality or coverage that your current plan allows. The price for your plan will also remain the same.
For customers wishing to upgrade, we'll send you new SIM cards and you can start using these immediately.