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How To Change Your SIM PIN Code on an Android Phone


Mar 08, 2024 • Filed to: Remove Screen Lock • Proven solutions

When you get a new SIM card, it usually comes with a default PIN (Personal Identity Number) code printed on the packaging, documentation, or back of the SIM card. This 4-digit code protects your phone number from unauthorized calls, texts, and data use. It’s essential to change the default PIN to one that’s both memorable for you and difficult for others to guess.

So, how to change the PIN on an Android phone’s SIM card? This article will provide a step-by-step guide to help you secure your data. But first, let’s explore why changing the default one is important.

a phone sim card

Part 1: Why Does Changing Your SIM PIN Code Matter on a New Phone?

Your SIM PIN code acts as a password for your SIM card, which stores your phone number, contacts, and other essential data. Unlike the PIN you use to unlock your phone, the SIM PIN code is a separate layer of security. If someone tries to use your SIM card in another phone without the correct PIN, they won’t be able to access your network or data.

Here are more reasons why changing the PIN code of a SIM card is a smart move:

  • Default PINs are easy to guess

Most carriers use generic PINs like “1234” or “0000”. Change it to something unique and harder to crack.

  • Protects data in case of loss or theft

If you lose your phone or it gets stolen, a strong PIN code hinders the thief’s ability to make calls, send messages, or access your data stored on the SIM. It buys you time to report the loss and block your SIM card before they can do any damage.

sim card locked

  • Prevents accidental PIN lockouts

Using a memorable PIN minimizes the risk of accidentally locking yourself out of your SIM card.

  • Peace of mind

It is crucial if you store sensitive info on your SIM or use your phone for work. Knowing about this extra safeguard is reassuring, ensuring your data stays protected.


Choose a PIN code for your SIM that’s easy for you to remember but challenging for others to guess. Avoid using birthdays, anniversaries, or other easily identifiable information. By taking a few minutes to change the PIN code of the SIM card, you’ll gain a significant security advantage for your new phone and data.

Part 2: How To Change Pin on Android Phone SIM Cards?

Keeping your SIM card secure is crucial for protecting your data and privacy. Thankfully, Android allows you to easily change your SIM card PIN to a more personal and memorable code. But before you begin:

  • Contact your network carrier to get your PUK code if you already have it. You’ll need this if you enter the wrong PIN three times and lock your SIM card.
  • Remember the temporary default PIN: Most SIM cards have a default PIN, often 1234 or 0123. If you haven’t changed it, this is the PIN you’ll use initially.


Entering the wrong PIN three times will lock your SIM card. You’ll need your network carrier’s PUK code to unlock it. Use it cautiously, as exceeding the maximum number of attempts will permanently block your SIM card. So, it’s best to memorize your PIN or store it securely to avoid relying on the PUK altogether.

Steps To Change Your SIM PIN

Here’s how to find and manage the SIM PIN code on Android:

  • Step 1: Navigate to your phone’s Settings app. Next, look for the Security and privacy or Lock screen and security (or other similar option) depending on your device’s model.
  • Step 2: Scroll down and tap on More security settings or Other security settings.
  • Step 3: Tap SIM card security or Set up SIM card lock (or something similar).
  • sim card security in settings

  • Step 4: If you have multiple SIMs, select the one you want to change the PIN code.
  • Step 5: Tap Change SIM PIN.
  • change sim pin code on android

  • Step 6: Input your current SIM card PIN code and tap OK.
  • enter old sim pin

  • Step 7: Enter your desired new PIN code and tap OK.
  • Step 8: Re-enter your new SIM card PIN code and tap OK to confirm.
  • Success! You’ve successfully changed the PIN code of your SIM card. Remember your new PIN for future use.

    Part 3: What To Do if You Forgot or Lost an iOS Device’s SIM PIN Code?

    If you’re an Android user, changing your SIM PIN is easy. But for iPhone users, forgetting it can lock you out. So, what should you do if you lose the SIM PIN code on iOS?

    First, avoid guessing your SIM PIN or PUK code. Every wrong guess increases the risk of permanently locking your SIM card, requiring a replacement. If you forget your PIN, contact your network carrier for help. They can usually unlock your SIM with the default PIN or PUK code. If that fails, you can request a new SIM card.

    However, there might also be situations where you’re locked out due to a carrier-restricted SIM card. If a quick resolution is important or you want to keep your current SIM card, consider using Wondershare Dr.Fone.

    network carrier sim locked

    Here’s a list of Dr. Fone’s key features:

    • Solve SIM lock issues within minutes
    • Support for various SIM carriers, whether your phone is on an installment plan
    • User-friendly interface and straightforward process
    • Can bypass various screen lock types like PIN, password, fingerprint, and pattern locks on both Android and iOS.

    How To Unlock Your iPhone SIM Card To Work With Any Carrier?

    Note that this process may need you to jailbreak your iPhone. Make sure you understand the risks involved before proceeding. If you are ready to remove your iOS device’s SIM lock, here’s a simple step-by-step guide to help you through the process.

  • Step 1: Download and install Dr.Fone on your computer. Ensure you choose the correct version for your operating system, whether Windows or Mac.
  • safe Downloadsafe & secure
  • Step 2: Connect your iOS device to the computer using a USB cable. Launch Dr.Fone, then go to Screen Unlock > IOS from the available options in the Toolbox window.
  • dr.fone toolbox home interface

  • Step 3: Select Remove SIM Locked to unlock the SIM PIN code, then click Start on the next screen.
  • dr.fone screen unlock tools

  • Step 4: Dr.Fone automatically recognizes your iOS device model, version, and other details. Click Unlock Now to confirm the details and proceed with the unlocking.
  • dr.fone unlock the sim card

  • Step 5: Once jailbroken, follow the specific instructions provided by Dr.Fone to complete the SIM lock removal process.
  • dr.fone on-screen instructions

  • Step 6: The software will initiate the SIM unlocking process and wait for it to complete. Once done, your iOS device’s SIM will be successfully unlocked.
  • dr.fone removed sim card lock


    Remember, securing your phone’s data starts with a strong, unique SIM PIN code – change it regularly! Now that you know how to change your PIN on an Android phone SIM card, you can change your PIN on Android and keep your data safe. But security goes beyond the PIN code. Enable additional protections like screen locks and two-factor authentication.

    Don’t worry about forgetting your screen lock on Android. For advanced troubleshooting, Dr.Fone stands ready. And if you encounter SIM-related issues on an iOS device, such as “SIM not supported” or being “locked to a carrier,” as mentioned above, it can help you. This powerful tool can diagnose and fix various mobile problems on both platforms.

    Tips: Are you searching for a powerful Screen Unlock tool? No worries as Dr.Fone is here to help you. Download it and start a seamless unlock experience!

    Frequently Asked Questions (FAQs)

    enter puk to unlock sim card

    PUK codes aren’t permanent: use them to unlock your SIM card after the wrong PINs, but be careful. Entering it wrong too many times (usually 10) permanently locks your SIM. Your mobile carrier provides the PUK code specific to your SIM card. Contact your carrier for assistance if you’re unsure about your PUK code.

    There are two main types of SIM card lock: PIN lock and network lock. When your SIM card is PIN-locked, you won’t be able to make calls, send texts, use data, or access most other phone features. However, you can still make emergency calls on your phone.

    With network lock, if you try to use a SIM card from a different network on a locked phone, you’ll usually see an error message and won’t be able to connect.

    In general, SIM locks do not expire. They are typically permanent unless you take specific action to remove them. The SIM PIN code lock stays locked until you enter the correct PUK code. For network SIM locks, different carriers have their processing times. It ranges from instantaneous to several days or even weeks.
    screen unlock

    James Davis

    staff Editor

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