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Here I have Samsung Galaxy S9 and let me show you how to setup the sim card protection by
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using that device and let me show you how to change the pin also
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So at the very beginning let's open the list of all applications, choose settings, then
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you have to choose lock screen and security, scroll down and here you have to tap other
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security settings. Choose setup sim card lock, let's enable the lock sim card by using the following switcher
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right here and you need to enter your current sim to activate it, so if you have some pin
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let's input this pin to activate the protection, tap ok. As you can see right now my device required a pin to use the sim card, you can also change
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this pin by using this option, you have to enter your old pin, you have to tap ok
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Now let's enter the new one, of course you have to do it twice just to confirm the operation
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tap ok and sim pin changed successfully. You can also disable the lock sim card just by using the same switcher and by inputting
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the new pin to confirm it. That's it, now you can go back and start using your device in a normal way
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