For security reasons, you may want to set consumption limits for sub-accounts. To do so, in the MB Limit field you can assign the total amount of MBs the sub-account can use in a month. This limit is renewed monthly and applies to all SIM cards assigned to the account. It is also possible to limit the amount of SMS MO in the SMS Limit field.
It is advisable, in case you add a limit to the account, to also set an alert to be notified in case you reach a certain percentage of this limit. To do this, you can put your email in Email for notification and then indicate at what percentage of the usage you want to be notified. The number (in %) must be entered in the Notification Threshold (%) field.
Remember to save your changes.