How to Change the SIM PIN of Your Android Device

How Change Sim Pin Code Lock Featured

The SIM PIN code is a security feature that protects against unauthorized individuals accessing your SIM card data. Some smartphone models come with this option on by default, while others need to have the feature enabled.

A vast majority of carriers provide standard SIM PIN codes like 0000 or 1234, while others generate random codes. In any case, it’s always a good idea to change the default code in order to boost the security of your device and prevent someone from simply guessing what your code is.

In this article we examine how you can easily change your SIM PIN on your device. In addition, it’s possible to remove the code altogether if you are confident that your device doesn’t need the extra layer of protection.

Why It’s Important to Lock Your SIM

Your SIM card doesn’t just contain your address book. Actually, the small plastic card also stores other valuable data, including SMS text messages, billing information and data usage.

As it happens, this data can’t be secured merely by setting up a PIN, passcode or some type of biometric lock on your phone. Only by activating the SIM PIN lock can users make sure this information will be secured against any potential hacking attacks.

How to Turn on SIM Lock

In order to turn on the SIM lock feature on a device that doesn’t have it activated by default, you will need to know your phone’s default SIM PIN. As we mentioned above, most carriers use defaulta, but that’s not always a rule. In the U.S., two of the biggest carriers – Verizon and AT&T – use 1111, while T-Mobile and Sprint employ 1234 instead. Typing in

If these codes don’t work for you, then you should try to call your carrier or check your provider’s website in order to obtain the default SIM PIN. Make sure you have the correct information before typing the code, though, because if the number of PIN input attempts exceeds three times, your SIM will get blocked. In order to unblock it, you will need to enter the PUK to unlock the SIM. The PUK is the PIN Unlocking Key that is usually delivered with your SIM card.

Once you’ve obtained your default SIM PIN, the next step is to turn on the SIM lock feature manually on your device. The path will vary based on your smartphone model and the Android version it’s using. For the purpose of this tutorial, we used a OnePlus running Android 10.

1. Open the Settings app on your phone.

2. Scroll down until you find “Security & Lockscreen.”

How Change Sim Pin Code Security Lock Screen

3. Find and tap on Advanced (all the way at the bottom).

How Change Sim Pin Code Advanced

4. Tap on SIM card lock.

How Change Sim Pin Code Card Lock

5. Select your SIM card (if you have a dual-card device).

6. Toggle the “Lock SIM card” option on.

How Change Sim Pin Code Lock Sim

7. Input your default SIM PIN.

How Change Sim Pin Code Toggle On Option

Every time you fire up the device or reboot it now, you will be required to input the default SIM PIN number.

Alternatively, on other devices you may need to follow a slightly different path like “Security & Privacy -> More Settings -> Encryption and credentials” to find the SIM card lock.

On an older Honor device running Android 8.1 Oreo, the feature is located under “Settings -> Security & Location -> SIM card lock.”

How Change Sim Pin Card Lock Android 8

Bottom line, make sure you look for the option in the Security/Privacy sections of your phone’s Settings. If you can’t find it on your own, try and perform a search in Settings using the keywords “SIM” or “Lock.”

How to Change Your SIM PIN Code on Your Android?

On the other hand, if you want to simply change your default code to something else, these are the steps to follow in order to do so.

1. Open the Settings app.

2. Scroll down until you find “Security & Lockscreen.”

How Change Sim Pin Code Security Lock Screen

3. Find and tap on Advanced (all the way at the bottom).

How Change Sim Pin Code Advanced

4. Tap on SIM card lock.

How Change Sim Pin Code Card Lock

5. Select “Change SIM PIN.”

How Change Sim Pin Code New Pin

6. Input your old code.

How Change Sim Pin Code Old Code

7. Input your new SIM PIN and then press OK.

How Change Sim Pin Code New Code

Alternatively, if for whatever reason you wish to remove the SIM PIN lock from your device, all you have to do is follow the steps above again and then toggle off the “Lock SIM card” option.

If you followed the steps to a T, you’ve now successfully added a layer of protection that will keep your SIM data safe. If you want to continue expanding your Android knowledge, you may want to learn how to avoid getting locked out of your Android device or how to unlock Android’s safe folder.

Alexandra Arici Alexandra Arici

Alexandra is passionate about mobile tech and can be often found fiddling with a smartphone from some obscure company. She kick-started her career in tech journalism in 2013, after working a few years as a middle-school teacher. Constantly driven by curiosity, Alexandra likes to know how things work and to share that knowledge with everyone.