HRESULT 0x8054820B (E_MBN_VOICE_CALL_IN

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Description:

A voice call is in progress and blocks the requested mobile-data operation.

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E_MBN_SIM_NOT_INSERTED	E_MBN_INVALID_CACHE

E_MBN_VOICE_CALL_IN_PROGRESS

E_MBN_VOICE_CALL_IN_PROGRESS is a Windows Mobile Broadband (MBN) HRESULT. It indicates that the modem is currently handling a voice call and cannot complete the requested Mobile Broadband action.

What to check

Wait for the voice call to end and observe the modem state-change notification before retrying.
Check device capabilities because some networks and modem modes restrict data work during voice calls.
Do not report this as a generic connectivity fault when the user or device is actively on a call.

Microsoft: MBN error codes

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