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I am working on a GSM phone running BREW.

I need to detect user swapping SIM card. Looking at BREW reference, the following AEEDeviceItems look promising -
AEE_DEVICEITEM_SIDHASH
AEE_DEVICEITEM_SID
AEE_DEVICEITEM_RUIMID

Is any one better than the others for the purpose of detecting SIM Swap?

Some questions popping into mind -
1. Will GSM phones support AEE_DEVICEITEM_RUIMID?
2. What is AEE_DEVICEITEM_SID, is it different per SIM? or per device? The reference only says "This returns the SID, as needed by the ADS. AEECLSID_BREWCREDENTIALS is required privilege level."
3. Is AEE_DEVICEITEM_SIDHASH the hash of AEE_DEVICEITEM_SID, or hash of something else?

Thanks!