What is a *uicc*?

[AC Question]

My phone is an android zte prestige (my carrier is boost/sprint).WHILE I WAS UPDATING THE PRL I RECEIVED A MESSAGE TO INSTALL THE *UICC* THAT CAME WITH MY PHONE AND THEN RESTART MY PHONE. I DON'T RECALL GETTING A *UICC* WHEN I PURCHASED MY PHONE.

 

[the tall guy]

Hi, can you now see the app on your phone, what happens when you open it?

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