It&#x27;s not a special card in that way -- your regular mobile provider SIM still works just as always.<p>The Microsoft &quot;special&quot; sim card is presumably a standard multi-MVNO sim card with (presumably) some nice app for buying service. Similar to Apple SIM or Google Fi.<p>It&#x27;s nice to have for people who and aren&#x27;t carrying around SIM cards to swap around. (Maybe they don&#x27;t know what a SIM card is, or maybe they haven&#x27;t had time to burn 2 hours in a mobile provider shop to get one). They can buy a device, turn it on, and the app walks them through buying data automatically so everything &quot;just works&quot;.