Security Policy can be assigned at different levels in hierarchy.
Account Level Security Policy: An Enterprise can create Security Policy at Master or Sub Account level that is available/applicable for hierarchy below that level. Policies applied at account (or sub-account) level will automatically be effective for all SIMs directly assigned to that account and sub-account.
In case a security policy needs to be applied at different levels in account hierarchy, it will be possible to for parent account to share its security policies with its sub-account.
SIM Level Security Policy
Any Security Policy applied at the parent account/sub-account level will be automatically effective for all SIMs directly assigned to that account/sub-account.
You can use allow list or deny list about the device IMEI codes.
SIMs can be activated & suspended at any given time.