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How to set the PIN code of 8T SIM card?
To prevent others from using your SIM card to make calls or use cellular mobile data, you can use the SIM card PIN code. After setting the PIN code of the SIM card, the SIM card will be locked every time the device is restarted or the SIM card is taken out.
To create a SIM card PIN, go to Settings _ Security, and then lock the screen _SIM card lock.
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