1: It's a per use model. You don't use it , you don't pay for it!

         The no usage definition is when there is 0 data usage registered on the network in a given billable month cycle for a SIM card.

          If there is data usage, the SIM is considered as ACTIVE.

2: There is a $0.40 /month Network Access Fee (NAF) per ACTIVE SIM. If your SIM is not active you don't pay the $0.40 .

3: Your data rate plan is added to the NAF

         For example : If your data price is $2.88 for 12 MB you would add $0.40 and this will give you a $3.28 monthly rate plan 

4: Data overage is rounded up to the MB based on your rate plan           

        In this case, you would pay (3.28/12) = $0.27 for the additional MB 

5: There is an overage limited of 25% of your original rate plan

6: SMS and emails alerts notice are sent to you in the event of overage. 

           You can then decide to deactivate your SIM remotely through the online portal.

7: Billing starts when a device start sending or receiving data. 

8: The first 25KB of data usage of a SIM are free so you can test your device connectivity before sending it in the field.