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Windows 8.1 can display incorrect radio access technology next to the mobile broadband network name

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Symptoms

On Windows 8.1, when a user first selects a region for accessing mobile broadband connectivity, the wrong radio access technology may be displayed alongside the mobile broadband network name. For example, "(1xRTT)" or "(1xEVDO)" is displayed next to the mobile broadband network name incorrectly.

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Cause

This issue can occur if the mobile broadband modem supplies a list of providers to the Mobile Broadband class driver through the CID_MBIM_MULTICARRIER_PROVIDERS response. The Mobile Broadband Interface Model (MBIM) specification allows only for reporting of the MBIM_CELLULAR_CLASS together with possible values that include "GSM" or "CDMA." The currently registered network data class does not necessarily apply to a multi-carrier provider (for example, "1xRTT" is not valid for a "GSM" network). The Mobile Broadband class driver apparently selects the same data class for all networks in this scenario by default.

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Resolution

Microsoft is investigating a solution for this issue as part of a future version of Windows.

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Keywords: kbexpertiseadvanced, kbtshoot, kbsurveynew, kb

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Article Info
Article ID : 2981783
Revision : 1
Created on : 1/7/2017
Published on : 7/8/2014
Exists online : False
Views : 319