The platform centralizes key subscriber operations: new SIM provisioning and activation, routing and validation during SIM swaps and number (MSISDN) changes, secure delivery of APN configuration to devices, remote updates to SIM Toolkit menus and lightweight services, and pop-up/flash messaging for important announcements. My role covered both the operational side (keeping the system healthy, measurable, and predictable) and product side (making flows simpler and more reliable).