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11-05-2006, 16:07
As others posted, that's the SIM PIN. Some sims do come with it on by default. My UM sim also did. It's a security measure to protect you in case you loose the sim. Check you phone's menu and set it to not ask for the SIM PIN. Once that's done, the sim can be put in any phone and it should not request that the PIN be entered.
Phones: Xiaomi Mi Mix 2, Samsung Galaxy A50, ASUS zenfone 3,
Sim cards: AT&T (Contract), 3 UK, Piranha Mobile
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