Exynos Usb Device4000 Verified Here

When you see it "verified," it typically indicates that the driver has been successfully installed or recognized by the operating system, allowing for tasks like firmware updates, data transfer, or boot repair. Technical Overview

Device authentication: The ROM sends a 256-bit nonce. The host responds with a signature computed using a known OEM key (e.g., Samsung’s download mode key).
Endpoint validation: Control endpoints 0x00 and 0x01 respond correctly to vendor-specific requests.
Secure handshake complete: The device is now ready to accept a signed bootloader or a custom USB transfer.

Tools like Odin require the Exynos USB interface to push BL, AP, CP, and CSC files to the device. Without the verified driver, the "ID:COM" box in Odin will not turn blue or yellow, preventing the flash. Data Recovery exynos usb device4000 verified

USB gadget mode

It is a exposed by certain Exynos kernel drivers (like s5p-ehci or dwc3-exynos ), often used for: When you see it "verified," it typically indicates

Rarely, you might see the verified status but the phone screen remains black. This occurs when the display panel is dead but the SoC is alive. In this case, the verified state is real—you can still flash firmware blindly by using Odin’s auto-reboot option. After 3–5 minutes, the phone will vibrate indicating a successful flash. Device authentication: The ROM sends a 256-bit nonce