How To Change Your SIM PIN Code on Your Meizu 21 Pro 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!

Network Locked SIM Card Inserted On Your Meizu 21 Pro Phone? Unlock It Now

Carriers provide cellular connections so you can access the Internet, send text messages, and make phone calls without Wi-Fi. You cannot escape the carriers once you begin using a cell phone.

Customers can purchase a new handset via carriers or the mobile phone market. You may need an unlocked phone if you wish to use a different carrier’s service on your smartphone. However, if you want a gadget linked to a specific SIM card, you may buy one from the carriers for a reduced price.

Part 1: What Does It Mean If Your Meizu 21 Pro Asks for SIM Network PIN?

When your phone prompts you to enter a SIM Network Unlock PIN, it means that your device is currently locked to a specific mobile network carrier, and it can only be used with SIM cards from that carrier. This locking mechanism is usually put in place by the carrier or the phone manufacturer to ensure that you continue to use their services, typically for the duration of a contract. As a result, your phone cannot be freely used with SIM cards from other carriers until it’s unlocked using the correct PIN or code.

Part 2: Why Does Your Meizu 21 Pro Say Invalid SIM Card – Network Locked SIM Card Inserted?

System Errors

Since SIM locking is a smartphone restriction implemented to stop it from being used on other networks, Android system errors can cause network-locked SIM cards. Resetting these errors can help unlock your network locked SIM card inserted device. Service providers decided to provide a formal SIM unlocking option as a result.

Because of this, any locked SIM may be readily unlocked, and once a device opens, it can work like a conventional mobile phone and with any SIM card of the user’s choosing.

Carrier Lock

The consumer must stick with the same service provider for a specific time after purchasing the bundled device and data pack. This is called a carrier lock on the Meizu 21 Pro device and is one of the most common errors in network locked SIM card inserted devices. During that time, the Meizu 21 Pro device will be network- or SIM-locked, prohibiting the user from changing service providers.

The user cannot change the SIM. The service provider will offer the SIM Unlock code needed to unlock the handset when the contract expires. The gadget can be used with any other SIM card and exported to another country without problems when the network lock has been removed.

Region Lock

Apple and AT&T initially worked together to implement the SIM lock and the SIM locked devices. The original purpose was to force the user to continue using the same service provider in a specific area or time.

However, some telecom service providers sell the handsets with select data plans as bundled plans in collaboration with the Meizu 21 Pro device manufacturers. As a result, the handset will cost less than it would otherwise. Sometimes, these offers are particular to a specific region, called a carrier lock.

Firmware Problems

Sometimes, the Meizu 21 Pro device manufacturers release many versions of the same firmware for different geographical locations.

As a result, it may be possible that the user may face contradictions in the agreement of device firmware and the network-locked SIM card that was supposed to be used on the Meizu 21 Pro device. Due to firmware problems, the users may also face a network-locked SIM card-inserted device.

Part 3: How to Unlock Network Locked SIM Card Inserted?

Unlocking a network-locked SIM card may seem like a complex task. However, it can be a straightforward process if you follow the right steps. In this section, we will guide you through the process of unlocking your network-locked SIM card. We will discuss 3 different ways you can unlock a network-locked SIM card inserted:

Method 1. Contact Network Carrier to Unlock Network Locked SIM

Contacting your network carrier is often the most recommended choice. It is a straightforward and reliable method to unlock your network-locked SIM card. Unlocking your network-locked SIM card through your carrier is a reliable and legal method. Before contacting your carrier, get information like your device’s IMEI number and account details. There are several ways to get in touch with your network carrier’s customer support.

You can call the customer support hotline, visit the website, or go to a physical store. The process usually involves receiving an unlock network code, which you need to use. Once you’ve entered the unlock code, your phone should display that it’s now unlocked. Test it with the new SIM card to ensure that it can make calls, send texts, and access mobile data without any issues.

Method 2. Use Online Unlock Service to Unlock Network Locked SIM

There are many online services available for unlocking a network-locked SIM card. In case you don’t want to go through your network carrier, these can be a good alternative. These services employ the IMEI number of the Meizu 21 Pro device to unlock smartphones.

One such service is Canada Unlocking , which offers to unlock your network-locked SIM card via email. Follow these steps to unlock a network-locked SIM card via online services:

Step 1: Use a web browser to access an online SIM card unlocking service like Canada Unlocking. On the main page, choose your network carrier or device brand.

Step 2: Follow it by providing the IMEI number of your device. Afterward, make the required payment, and you will receive the unlock code via email.

Method 3. Repair Your Meizu 21 Pro Firmware If Your Unlocked Phone Suddenly Network Locked

Coming across “Network Locked SIM Card Inserted“ doesn’t necessarily mean that your SIM card is network locked. It can also happen due to a system bug or glitch. This can be the case if you suddenly face this issue after recently updating your device. In such scenarios, you need a reliable Android system repair tool like Wondershare Dr.Fone.

With this tool, you can repair Android OS system issues such as black screen of death, apps crashing, and many more. It supports over 1000 Android models across all major Android brands for system repair. Below are the steps you need to fix the network-locked SIM card issue:

Step 1: Download and Connect Wondershare Dr.Fone

First, download Wondershare Dr.Fone from its official website. Install the software on your system and launch it to proceed. Establish a connection between your Android and the system using a USB cable. Furthermore, access the “Toolbox” section and select “System Repair” to move forward.

Step 2: Add Your Meizu 21 Pro Device Details

After selecting “System Repair,” you will proceed to a new window. Here, choose the “Android” button and proceed to the next screen to select “Start.” Now add your device details like “Brand”, “Name,” “Model,” “Country,” and “Carrier.” Then, checkmark the “I agree with the warning and I am ready to proceed” box from the bottom right corner and click “Next.”

Step 3: Solve the Network Locked SIM Card Inserted Issue

Now, you need to put your Android device into Download Mode. You can follow the instructions given on the screen for it. As soon as the Meizu 21 Pro device is in Download Mode, Wondershare Dr.Fone will start downloading the firmware. Once it is downloaded and verified, click “Fix Now.”

Confirm your choice by inserting “000000” in the pop-up dialogue box and tap “Confirm.” It will start the Android repair process to fix all system issues.

Bonus Tip. How to Unlock Network Locked Sim Card Inserted on iPhone?

If you want a fast and easy method to unlock your network-locked iPhone, you can use a third-party tool such as Dr.Fone – Screen Unlock (iOS). It is the best sim-unlock tool for iPhone users. It enables users to safely unlock their devices within five minutes. With Dr.Fone, you don’t have to wait for the sim-unlock code or reset your device firmware that can remove all your data.

You can download Dr.Fone on your PC and use it to unlock your iPhone without data loss. You can also use Dr.Fone to unlock your iPhone’s screen lock and Apple ID. Although Dr.Fone is a one-stop solution for all of your phone-related problems, its sim-unlock only works for Apple devices. Here is how you unlock your carrier-locked iPhone with Dr.Fone – Screen Unlock (IOS).

Download and install Dr.Fone on your PC. Launch the application and select the “Screen Unlock” tab from the list on the homepage.

Now, click on the “Remove SIM Locked” tab on the next page. You can only use it to unlock iPhones.

Connect your iPhone and PC with a USB cable. Once your device is ready, click on the “Start” option to proceed with the sim unlock process.

Next, the system will detect the Meizu 21 Pro device connection, then its information will show up on your PC screen. If all of it is OK, click on the “Unlock Now” option.

You cannot unlock your iPhone without a jailbreak, so you must do it before the system unlocks it. You can learn about the jailbreak process via the guide, or watching the video provided by Dr.Fone to jailbreak your iPhone is also feasible. The process is compatible with devices running iOS 12 to iOS 14.8.1.

Now, you have to complete three tasks on your iPhone. First, put the SIM card out of your device. Open “Settings” and tap on the “WIFI” option. Tap on the blue exclamation mark next to all the connected networks and select “Forget This Network.” Now, switch off the “WIFI” and insert the locked SIM card in your iPhone. Click on the “Continue” option on your computer.

After that, Dr.Fone will automatically start the SIM unlocking process. You can see its progress on your PC. The process only takes a few minutes to complete, so you don’t have to wait for a long time.

After the process ends, all the sim restrictions on your iOS device are now removed and you can use sim cards from any network carrier. Next, click on the “Done” option to end the sim unlocking process.

Part 4: Why is SIM Unlocking Important?

As previously stated, a SIM lock enables a service provider to stop a customer from using the smartphone with the SIM cards of another service provider. This guarantees that the Meizu 21 Pro device is only being used with the original SIM card for each provider. This locking also has a lot of drawbacks because it is incompatible with any other SIM card.

The phone cannot be used with other SIM cards if the SIM lock is enabled. Customers must therefore adhere to the current plan as is.
Since nobody wants to purchase a locked phone, it is hard for someone to sell or gift the mobile.
Traveling abroad with a SIM-locked phone could provide some challenges because you won’t be able to use a local SIM card on the phone while you’re there.

All the problems can be fixed, and the SIM works in any nation with the removed SIM lock.

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### Conclusion

Any of the methods above can work to get around the prohibition against using other SIM cards with your Android handset. The best thing about using Dr.Fone-Screen Unlock is that you don’t need unlocking codes to complete the tasks.

The Best Android Unlock Software For Meizu 21 Pro Device: Top 5 Picks to Remove Android Locks

Are you looking for the best Android unlock software in 2024? Whether your Android device is locked due to a forgotten password, pattern lock, broken hardware key, or bootloader issues – unlocking it can be quite frustrating. Fortunately, there are several great Android unlock software available that make unlocking your device much easier. Here’s a look at five of the best Android unlock software in 2024:

Top 1: Dr.Fone - Screen Unlock (Android)

Is your Android lock screen causing you trouble? Forgot your password or pattern? Don’t worry, just use the Dr.Fone - Screen Unlock (Android) , a powerful tool that can help you remove the lock screen on your Android device. This software prepares you with simple instructions, wherein you can unlock your Android device screen within minutes, and save you from ending up with a locked phone after too many pin/passcode/pattern attempts.

You can even unlock part of Samsung and LG devices without data erasing , so you can still access the data after unlocking. Most softwares need to erase all data on the phone once the Meizu 21 Pro device is unlocked and you cannot get the data back anymore. That’s terrible if you have many precious videos, photos, or other data on your device! Right?

Dr.Fone - Screen Unlock (Android)

Get Rid of Your Android Lock Screen in No Time

Remove 4 screen lock types: pattern, PIN, password & fingerprints.
Unlock 20,000+ models of Android phones & tablets.
Bypass Android FRP lock without a PIN or Google account.
Everybody can handle it without any technical background.

4,008,672 people have downloaded it

Let’s dive in and learn how to use this handy software

safe & secure

Step 1. Initiate Dr.Fone on your computer, and select “Screen Unlock”

You can also use this tool to unlock other Android phones including Huawei, Lenovo, Xiaomi, etc., the only sacrifice is that you will lose all the data after unlocking.

Step 2. Select Device Brand and Put Device into Specific Mode

Choose the Meizu 21 Pro device brand to unlock the screen, and your Android device will automatically enter the specified modee.

Step 3. Screen Unlocked Successfully

Dr.Fone will start to unlock Android screen after getting into the specific mode. After completion, your Android phone is unlocked without the need to enter passwords.

You now have access to all data on your Android device with this Android unlock software free download. However, if you have trouble bypassing your Samsung Google account (FRP), the FRP removal function of Dr.Fone-Screen Unlock can be helpful.

Top 2: NokiaFREE Unlock Codes Calculator

This wonderful utility is ideal to unlock cell phones. You can choose between Nokia, Samsung, Panasonic, LG, Alcatel, NEC, Maxxon, Sony, Siemens, and Vitel to enable the unlock feature.

Step 1. Open the NokiaFREE Unlock Codes Calculator program.
Step 2. Eight boxes and a window appear.
Step 3. Enter the cell phone model of the first box.
Step 4. Enter other details like DCT, IMEI, country, and company names in the subsequent boxes.

Step 5. To get the EMEI code, check the cell “*#06#”.
Step 6. Under options, choose IMEI Checksum Verification or Nokia Expert, Stretched, or Select Mode from IMEI.

Step 7. The code is calculated to release your cell phone.

Top 3: Multi Unlock Software

Multi Unlock Software is a versatile phone unlock software for devices like Samsung, Sidekick, Sony Ericsson, Dell, iDen, Palm, ZTE, and Huawei. Easily unlock your phone with this Android unlock software free download.

Ensure USB-Debugging is enabled. You’ll find it in the phone menu. If necessary, drivers can be installed.
Click on the Check Connection button once using the “ADB Read Info” before you unlock.
To locate the “Read Info” button, use the rj45 cable, or choose the phone modem.
To locate the “Pattern Unlock” button, use the rj45 cable, or choose the phone modem.
Versions later than “4XX do not have a pattern unlock support.
Then follow on-screen instructions for each device.

For example, in a Motorola Iden,

Before you begin:

Run the unlock client from “Start”> then Multi Unlock Client> then Unlock Client.
Enter your username and password, then click on “save login data.”
Under the Settings tab, ensure the “main server” is chosen.
Ensure “Save Login Data” is enabled.

Step 1. Download the software and connect your phone to a PC

Install your Motorola Iden Drivers. Go to Start> then All Programs > Nextgen Server> then iDen Code Reader> then iDen Drivers. Power connect the phone via a USB cable.
Initiate “Boot Mode” by simultaneously clicking on * & # keys with a power-on handset.
Connect the Motorola Iden phone to your PC via a USB cable.
Windows will now download and install necessary drivers to activate the Android phone unlocking software.

Step 2. Removing CNS With This Android Unlock Software

The first step is to initiate the unlock client/software feature. Click on Start> then All Programs> then Nextgen Server > then iDen Unlocker.
Click on the tab “CNS unlock”.
Initiate “Flash Strap Mode” by holding * and # keys with the power-on handset.
Then connect your iDen phone to your PC via a USB cable.
Unlock CNS New or Old accordingly.

Top 4: iMobie DroidKit

There might be many software solutions that you may counter; however, iMobie DroidKit provides you with the most effective toolkit for managing multiple Android scenarios. While supporting thousands of Android devices, users can easily unlock their Android device with its simple and intuitive interface. This software ensures that the Android device is easily recovered from any scenario where the Meizu 21 Pro device is locked.

To understand how to unlock your Android software with iMobie DroidKit, you need to follow the steps explained below.

Step 1. Download and install iMobie DroidKit on your computer. After connecting your device with the PC via USB, select the “Screen Unlocker” mode.

Step 2. The platform prepares a configuration file for your device. Once prepared, tap on “Remove Now”.

Step 3. You need to put your Android device in Recovery Mode. Follow the instructions provided by the software for removing the Wipe Cache partition on your device.
Step 4. Over the removal of the cache, the Android starts to be unlocked. It takes some time to complete.

Top 5: PassFab Android Unlocker

Another option that may feature your need for an Android unlock software is PassFab’s Android Unlocker. This platform has made device unlocking extremely simple and easy. It can perform all major kinds of procedures to help you cater to all the issues present in the Meizu 21 Pro device.

You need to follow the steps explained below to understand the process of unlocking your Android using PassFab Android Unlocker.

Step 1. Open the program and select the option of “Remove Screen Lock” after connecting your device to the computer with a USB cable.

Step 2. The platform demands confirmation before starting the process. Click ‘Start’ to initiate the process.

Step 3. The platform provides a prompt showing the completion of the task. The Android device will be successfully unlocked.

Frequently Asked Questions about Android Unlocking: Get the Answers Here

In this part, we will answer some frequently asked questions about Android unlocking to help you understand the process and make an informed decision.

Q1: What is an Android Lock?

An Android lock is a security feature that allows you to protect your device from unauthorized access. There are various types of Android locks, such as pattern locks, PIN locks, and fingerprint locks.

Q2: Why Would I Want to Remove an Android lock?

There are several reasons why you might want to remove an Android lock. For example, you may have forgotten your lock screen pattern, PIN, or password. Alternatively, you may have purchased a second-hand device with a locked screen and want to gain access to it.

Q3: What is the Master Unlock Code for a Samsung?

A Master PIN code, also known as a Samsung Unlock Code , is a unique numeric code that can be used to unlock a Samsung device. This code is typically provided by the manufacturer or carrier and is used to remove any restrictions or limitations on the Meizu 21 Pro device. It allows the user to use the Meizu 21 Pro device with any carrier or SIM card, giving them more flexibility and freedom. It is important to note that the Master PIN code is different from the Meizu 21 Pro device’s regular PIN or password, and it should be kept confidential to prevent unauthorized access to the Meizu 21 Pro device.

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### Q4: Can I Remove an Android Lock Without Losing My Data?

If your device is Samsung or LG, Dr.Fone could help unlock your screen without erasing your data. Please check if your tool model is involved in the device information list .

safe & secure

Conclusion

To conclude, for those looking for the best Android unlock software in 2024, our top recommendation is Dr.Fone - Screen Unlock (Android). With its exceptional features and high success rate, it outshines the competition. Whether you need to remove a PIN, pattern, or fingerprint lock, Dr.Fone offers a reliable solution. For more information and answers to frequently asked questions about Android unlocking, refer to our comprehensive guide on unlocking Android devices . Unlock your Android device with confidence using the top-rated Dr.Fone - Screen Unlock (Android).

Sim Unlock

How To Change Your SIM PIN Code on Your Meizu 21 Pro Phone