The Global Service Exchange (GSX) is Apple's internal, centralized database network used by authorized technicians to verify hardware integrity, warranty status, and legal ownership.
When you run a premium IMEI check, the tool taps directly into the GSX database to pull verifiable server-side proof of a device's history. This is the only reliable way to check the true Find My iPhone (FMI) status remotely, as Apple removed its public-facing checking tools to prevent malicious scraping.
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