HRESULT 0x8054820C (E_MBN_INVALID_CACHE): meaning and diagnosis

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E_MBN_INVALID_CACHE means the Mobile Broadband API detected invalid or inconsistent cached provider information for the current device or interface.

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E_MBN_VOICE_CALL_IN_PROGRESS	E_MBN_NOT_REGISTERED

E_MBN_INVALID_CACHE

E_MBN_INVALID_CACHE is a Windows Mobile Broadband (MBN) HRESULT. It indicates that the Mobile Broadband visible-provider cache cannot be used for the requested operation.

What to check for E_MBN_INVALID_CACHE

Refresh provider information from the device instead of selecting a provider from the stale cache.
Check for changes in radio state, location, SIM, roaming status, or device reset since the cache was built.
Keep cache invalidation separate from provider-selection logic so a refresh failure is visible in diagnostics.

Microsoft: MBN error codes

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