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                    <h4 class="c-grey-900"><i class="c-yellow-500 fas fa-question-circle"></i> How to manage Sim Cards</h4>
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<h5 style="margin-top: 30px;"> SIM cards table overview </h5>
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The meaning of the table columns explained:
<ul><li>ICCID - a worldwide unique SIM card identification. Must be populated (non-empty)</li>
<li>MSISDN - Telephone number assigned with SIM card. Many cellular router devices are not reporting actual telephone number for a SIM card, just ICCID. If you want to have the MSISDN filled in and thus be able to display it or search using MSISDN, you need to fill in the MSISDN manually.</li>
<li>Label - your name for this SIM card. This is a primary field that gets displayed (e.g. in the Devices table). If empty, ICCID is used instead of it.</li>
<li>Dev(ice) - If you want to manually specify in which device the SIM card is inserted, you may use this column. The use case of this is to be able to enter backup SIM cards that are inserted into devices but unless the primary SIM card fails, the device does not switch to the backup SIM card, thus not reporting it to the DWARFG_LONG. Such SIM card cannot be added automatically until the device actually reports them.</li>
<li>Dev(ice) last seen - DeviceID of the device that reported the SIM card as inserted into it. It is the device where the SIM card was last seen in (last reported by). This column gets filled in automatically.</li>
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<h5 style="margin-top: 30px;"> SIM cards in the system </h5>
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When a new SIM card is reported by a device to DWARFG_LONG, new entry for a SIM card is created, populating following columns:
<ul><li>ICCID</li>
<li>Dev(ice) last seen</li>
</ul>
When an existing SIM card is reported by a device, it either does not change anything (SIM card is still in the same device as last time) or it updates the <i>Dev(ice) last seen</i> field (in case the SIM card was moved into a new device).
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Only the reported SIM cards can be automatically listed in the system. Consider a SIM card that is inserted in a cellular router in the backup SIM slot (e.g. the device is able to accomodate 2 SIM cards). Until the device actually switches to the second SIM card, there is no way how the SIM card could be reported to the DWARFG_LONG. If the switch never happens, the SIM card is not reported and thus never automatically appears in the table. If you want to see it among your other SIM cards, you need to enter the SIM card manually or force the device switching to that SIM card.
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