HRESULT 0x8054820A (E_MBN_SIM_NOT_INSERTED): meaning and diagnosis

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Description:

No SIM is inserted or available to the mobile-broadband device.

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E_MBN_SERVICE_NOT_ACTIVATED	E_MBN_VOICE_CALL_IN_PROGRESS

E_MBN_SIM_NOT_INSERTED

E_MBN_SIM_NOT_INSERTED is a Windows Mobile Broadband (MBN) HRESULT. It indicates that the modem has no usable SIM available for the requested operation.

What to check

Confirm the physical SIM is installed correctly, or that the expected eSIM profile is enabled and exposed to the modem.
Refresh the device state after inserting or replacing a SIM instead of using cached interface information.
Check device-manager and modem diagnostics if the SIM is physically present but is never detected.

Microsoft: MBN error codes

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