Protect your SIM from unauthorized use by settting a security PIN.
Your SIM card holds valuable account information, and inserting it into a compatible phone means phone calls can be made using your phone number. You can protect your SIM card from unauthorized use by setting a PIN. The PIN is a numeric code, typically four to eight digits. To set a unique PIN, you'll need to know your default PIN code. This can be found in your phone's user guide or by contacting your wireless provider. Default PINs are commonly "1111" or "1234."
Instructions
1. Power on your phone and access "Settings." Choose the security option.
2. Highlight and select the "Change PIN Code" option. You will be prompted to enter in the current PIN--which will be the default PIN as set by the manufacturer. Consult your user guide or carrier if you do not know the PIN.
3. Type in the default PIN, and press "OK." You will then be prompted to enter in a new PIN code. Use your keypad to enter in your desired PIN, and press "OK." Retype the PIN to confirm. You will receive a confirmation that the PIN has been changed.
4. Return to your phone's "Settings" menu. Scroll to "Security," then choose "Lock SIM Card." Some phones might allow you to adjust settings as to when the phone will prompt you for the code, such as upon powering on or when the phone goes into standby mode. Adjust the settings, if applicable, then press "OK" to confirm.
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