detecting MCC / MNC: what's the difference between..? | developer.brewmp.com detecting MCC / MNC: what's the difference between..? | developer.brewmp.com

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detecting MCC / MNC: what's the difference between..?

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I see that I can use ITELEPHONE_GetServingSystemInfo() to retrieve ServingSystemInfo. But given that, I see two different paths for retrieving plmn (where MCC / MNC is encoded). What's the difference between these two paths, and in what context does each matter?

IF (pSSInfo->mm_information.plmn_avail)...
pSSInfo->mm_information.plmn
//  Serving System information
//    Mobility management information i.e. network
//      plmn identity of the network


IF (pSSInfo->sys_id.id_type==AEET_SYS_ID_TYPE_UMTS)...
pSSInfo->sys_id.id.plmn
//  Serving System information
//    ID of the selected system
//      system identifier
//        plmn identity: UMTS (WCDMA/GSM) system ID

Thanks.

-steve