How To Change Your SIM PIN Code on Your Realme C51 Phone

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.

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.

• 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.

Remember:

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.

Note:

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).

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

• Step 6: Input your current SIM card PIN code and tap OK.

• 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 .

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.

• 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.

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

• 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.

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

• 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.

Conclusion

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!

Top 3 Sites to Find Free Realme Unlock Codes to Unlock Your Realme Phone

It is really irritating when you realize that Realme C51 phone is locked to a specific network. When you travel to another country, your phone becomes useless – you can’t use a foreign sim card. If your Realme C51 phone is locked to a network and want to switch to a different provider, you are out of luck.

Thankfully, there are a few easy ways to unlock your Realme C51 phone with free Realme unlock codes. In this article, we review and explain 4 different websites that offer free unlock codes for Realme C51 phones. Read ahead and learn how you can use four Realme unlock code websites.

Part 1: SIM Unlock Service

SIM Unlock Service is one of the best and trust-worthy SIM unlock code generators available on the market. This is not a free option, but it is so effective that many users find it is worth the price. It saves you so much hassle that it is worth the small upfront fee. Doctorsim will permanently unlock your phone, enabling you to use your phone on all carriers around the world. Most importantly, using DoctorSim will not void your warranty.

How to use DoctorSim SIM Unlock Service to unlock Realme C51 phones?

Step 1. Go to DoctorSim’s official website , so you know that you can trust it. Click on the ‘Select Your Realme C51’ button, and then select Realme from the list of brands.

Step 2. Fill in your phone’s information and your contact details in the following window, including the phone IMEI, phone model, and your email. Once your order is processed, the system will send you your personalized unlock code and unlocking instructions. You can then follow the instructions to unlock your Realme C51 phone. Easy!

Part 2: Unlockitfree.com for free Realme unlock codes

Unlockitfree.com is a free remote unlock service, providing unlocking codes for Realme C51 phones and other models. They offer a fast and free service, but it is not always reliable.

How to use the Unlockitfree.com Unlock Service?

1. First, enter your phone’s unique IMEI into the site, and then the site checks to ensure that it is genuine.

2. Choose your phone model from the list provided, and then choose your country. Once you choose your country, a list of supported Service Providers will pop up. Choose your service provider, read the terms and conditions and accept. At this point, click Generate.

3. The Unlockitfree Generator will show you a series of 7 different unlocking codes. Not all of these will work; usually the best options are the 1st and 7th code on the list.

4. Without removing your SIM card, input these codes into your phone’s Home screen.

Hopefully you will have success – although, this is not guaranteed (as it is with the first Dr.Fone option above).

Part 3: FreeUnlocks for free unlock codes for Realme

Unlock-Free is a great option for unlocking your locked Realme C51 phone. The steps are quite simple and hassle free, but do keep in mind that this is a paid service. You might be able to use a free offer from TrialPay in order to get your Realme C51 phone unlocked for free.

Here’s how you can use FreeUnlocks?

1. Visit the FreeUnlocks site and locate the box asking for the phone’s model name. Insert your Realme model number into this box and then hit the “Unlock Phone” button.

2. After you select this button, you will taken to a new page where you will be prompted to enter 3 different pieces of information, such as the phone’s SIM’s availability, your country and your phone network.

3. Once you enter all of this information correctly, click the ‘continue’ button. This button will take you to a payment page, and you will have to pay $9.99. At this point you will be sent an unlock code, and you should be able to unlock your phone and use it anywhere in the world.

Part 4: Unlock-Free for Realme unlock code

Unlock-Free offers free unlock codes for Realme, as well as for other cellphone models and brands. This is a reliable site that will do the job with little hassle.

Using Unlock-Free to get an Realme unlock code

1. Head to the Unlock-Free website. Hover your mouse or cursor over the left side “Free Services” button. Here you will see Realme listed alongside other brands.

2. Once you select Realme, you will see an Realme logo. Below the logo is a list of many different model numbers; select your specific model number.

3. On the next page you will be prompted to enter your IMEI number. One you do this, you need to agree to the terms and conditions. At this point you will receive an unlock code that you use to unlock your Realme C51 phone.

Dr.Fone - Screen Unlock (Android)

Unlock Your Realme Phone Without Password

• Pattern, PIN, password, fingerprints & face screen lock can all be unlocked.
• Bypass Android FRP lock without a PIN or Google account.
• Unlock mainstream Android brands like Samsung, Huawei, Realme, Xiaomi, etc.
• No tech knowledge required, Simple, click-through, process.

3,981,454 people have downloaded it

Conclusion

If your Realme C51 phone is locked, you don’t need to worry. It is really easy to find Realme unlocking codes online, and within a few minutes you should be able to unlock your phone and get using it on other networks and around the world. Enjoy!

Top 10 Realme C51 Android SIM Unlock APK

Part 1. Top 10 Android SIM Unlock APKs

The following are the top SIM unlock apps for Android devices.

1. GalaxSim Unlock

This is an app that is designed to unlock the SIM for Samsung Galaxy devices. It eliminates the need for a sim network unlock pin to unlock the Realme C51 device, all you need to do is press a button and you can change your carrier SIM. The app itself is free to download but you have to make an in-app purchase to unlock the Realme C51 device. It also comes with additional features that include the ability to Backup and Restore EFS data and also get detailed information on your SIM status.

2. Unlock your Phone

This is another Android app that can help you unlock your device’s SIM. It is fast, reliable and safe to use. It can be used to unlock all brands including Blackberry, LG, HTC, Huawei, Motorola, Samsung, Sony and Alcatel devices. You can pay for the unlocking service via PayPal.

3. Device SIM unlock

This is another app that can be used to unlock a whole host of devices including almost all Samsung Models, LG models, HTC, Alcatel and Sony devices. It is also very easy to use and has received quite a lot of good reviews from those who have used it.

Dr.Fone - Screen Unlock (Android)

Unlock Your Realme C51 Device in a Flash

• Pattern, PIN, password, fingerprints & face screen lock can all be unlocked.
• Bypass Android FRP lock without a PIN or Google account.
• Unlock mainstream Android brands like Samsung, Huawei, LG, Xiaomi, etc.
• No tech knowledge required, Simple, click-through, process.

3,981,454 people have downloaded it

4. SIM Unlock- Samsung Galaxy

This is an app that will unlock your device and allow you to use it with just about any other app. It is an app that is designed to work with Samsung devices only although it does support all Samsung devices. It works by generating a code that can be entered on to the Realme C51 device to unlock the SIM. The app itself is free to download but you have to pay for the unlock codes. Payment can be made via PayPal or credit card.

5. SIM unlock for HTC phones

Download Link: https://play.google.com/store/apps/details?id=io.unlock.htc

As the name suggests this app can be used to unlock HTC devices. It is compatible with just about all HTC devices and although the app can be installed for free, you have to pay for the unlock codes you need to unlock the Realme C51 device. It is very easy to use, with an interface that provides assistance. It can unlock devices for any carrier in the world. They also accept PayPal as a form of payment.

Click here

### 6\. Unlock your Phone Fast & Secure

Download Link: https://play.google.com/store/apps/details?id=com.unlockscope.app

This is an Android app that you can use to unlock just about any Android device. Like most of the ones we’ve seen it works by generating unlock codes for your device. Orders are completed in real time and they even offer a 100% money back guarantee. It can be used to unlock almost all devices including LG phones, Samsung phones, HTC phones, Motorola phones, Blackberry phones and Sony devices among many others.

7. Unlock Phone Free Unlock Codes

This is yet another app that allows you to easily unlock your Android device. It works on just about any Android device and has been used by enough people to gain a reputation. It is very easy to use and will also generate the unlock codes for your device in real time. But don’t let the name fool you, the service is in no way free. Only downloading the app is free. But they do accept PayPal as a form of payment.

8. Unlock My Realme C51

This app will unlock almost all devices in the shortest possible time. Like all the others on this list it does this by providing you with unlocking codes for your device. It can unlock a wide range of devices including HTC, LG, Motorola, Nokia, Sony Ericsson, Samsung, and Blackberry among others. The app itself is free to download but you have to pay to receive the unlock codes.

Click here

### 9\. Mobile Unlocking app

Another really reliable Android app that unlocks your device’s SIM. This one has been around for quite a while and with a few bug fixes it has grown to become a very reliable app. There is just one constant complaint that we’ve noted with the app- most people say the unlocking service is too expensive. It has however been used by a lot of people and can unlock just about any device as long as you have the IMEI number.

10. Phone Unlock Codes

This app has been around providing unlocking services for over 10 years. It is a great app if you are looking for reliable and affordable unlocking services. You provide the app with the IMEI code for the Realme C51 device you want to unlock and the app generates a code for you to use in unlocking the Realme C51 device. The app allows you to make payment via PayPal or credit card and can be used to generate codes for lots of devices including LG, HTC, Huawei, Nokia, Samsung and Sony among many others.

We hope you are able to find an app to unlock your device. Let us know how the app of your choice worked out for you.

Part 2. Best Android SIM Unlock Service

Besides app the useful apps to help you SIM unlock the phone, you can also try a reliable SIM Unlock service. DoctorSIM Unlock Service works perfectly for SIM unlocking your Android phone. It’s a totally hassle-free solution.

How to use SIM Unlock Service to Unlock Your Realme C51

Step 1. Visit the official website and click on Select Your Realme C51. Then select your phone brand among all the logos.

On the following webpage, fill in your phone model, IMEI number and contact email, and finish the payment process.

Step 3. The system will send you the unlock code and instruction email shortly. You can then follow the instruction along with the unlock code to permanently unlock your Android phone.