This article was co-authored by How.com.vn staff writer, Nicole Levine, MFA. Nicole Levine is a Technology Writer and Editor for How.com.vn. She has more than 20 years of experience creating technical documentation and leading support teams at major web hosting and software companies. Nicole also holds an MFA in Creative Writing from Portland State University and teaches composition, fiction-writing, and zine-making at various institutions.
This article has been viewed 3,744 times.
This How.com.vn teaches you how to protect your iPhone’s SIM card with a 4-digit code that keeps others from making calls or using the internet.
Steps
Open your iPhone’s Settings. It's the app with a gray gear icon on your home screen.
Scroll down and tap Phone. It’s about halfway down the list.
Scroll down and tap SIM PIN. It’s near the bottom of the list.
Slide the “SIM PIN” switch to the On position. The switch will turn green.
Enter the 4-digit SIM PIN. If you’ve set up a SIM PIN before, enter the code when prompted. If not, use your carrier’s default SIM PIN.[1]- If you don’t know your carrier’s default SIM PIN, don’t try to guess it, as that may permanently lock your SIM. Contact your carrier to find out the correct PIN.
Tap Done. It’s at the top right corner of the screen. The SIM PIN is now enabled.[2]- This code (called a SIM PIN) is different from the screen lock passcode, and is only required when turning on the device.
- Each time you restart your phone after powering it down, you'll see a pop-up screen that says "SIM Locked." To unlock it, tap Unlock, then enter the PIN.
- You can change the SIM PIN at any time by returning to this screen and selecting Change PIN.
Advertisement
Expert Q&A
Tips
- Your provider may be able to give you a PUK (Personal Unlocking Key) if you permanently lock your SIM.Thanks
- If you don’t have your carrier’s PIN and don’t know which carrier to contact, check the back of the SIM for your carrier’s logo or name.Thanks
References
About this article
1.Open your Settings.
2.Tap Phone.
3.Tap SIM PIN.
4.Slide the "SIM PIN" switch to the On position.
5.Enter the 4-digit SIM PIN.
6.Tap Done.
Is this article up to date?
⚠️ Disclaimer:
Content from Wiki How English language website. Text is available under the Creative Commons Attribution-Share Alike License; additional terms may apply.
Wiki How does not encourage the violation of any laws, and cannot be responsible for any violations of such laws, should you link to this domain, or use, reproduce, or republish the information contained herein.
- - A few of these subjects are frequently censored by educational, governmental, corporate, parental and other filtering schemes.
- - Some articles may contain names, images, artworks or descriptions of events that some cultures restrict access to
- - Please note: Wiki How does not give you opinion about the law, or advice about medical. If you need specific advice (for example, medical, legal, financial or risk management), please seek a professional who is licensed or knowledgeable in that area.
- - Readers should not judge the importance of topics based on their coverage on Wiki How, nor think a topic is important just because it is the subject of a Wiki article.
