Hello,
SIM, USIM, and UIM cards are not hot swappable. To ensure that the installed SIM, USIM, and UIM cards work properly, manually restart the 3G modem after hot swapping these cards.
https://support.huawei.com/hedex/hdx.do?docid=EDOC1000163385&id=dc_cfg_lte_0015&lang=en
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system-view
interface cellular interface-number
modem reboot
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As of now, there is no way to generate a trap or an alarm from AR router to NMS tool, when the SIM card is removed, the SIM Status can only be checked by command "display cellular 0/0/0 all"
https://support.huawei.com/hedex/hdx.do?docid=EDOC1000163385&id=display_cellular&lang=en
I hope this helps.