How To Change Your SIM PIN Code on Your Oppo F25 Pro 5G 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!

Android Unlock Code: Sim Unlock Your Oppo F25 Pro 5G Phone and Remove Locked Screen

When you buy a phone, your matter of concern is whether to buy a locked phone or an unlocked Phone. Locked phones may look much safer to you, but they are very inconvenient when it comes to normal use. These phones are bound to one carrier only, which is their biggest disadvantage. At the same time, unlocked phones save you from this hassle.

If you’ve bought a locked phone and facing problems, you need not worry as there are multiple ways to unlock your phone. For that, this article has provided the solution to your issue in the most intelligible way.

Part 1: Difference between Unlocking, Rooting, and Jailbreaking

This part of the article shall differ from three very similar terms, Unlocking, Rooting, and Jailbreaking, to clear your confusion.

Unlocking

Unlocking a phone means making it compatible with other SIM carriers. An unlocked phone is not pinned to a single SIM carrier; rather, it lets you switch carriers. SIM Card lets your phone connect to a specific network, but it depends on your phone’s hardware compatibility. If it’s not compatible with a specific network, then nothing can change that.

To unlock your phone, you have to enter a specific code to remove the restrictions of the network. However, there are ways to unlock your phone without granting permission from the network.

Rooting (for Android)

Rooting a phone means gaining “root access” on another phone. This process works for Android only. However, it can also be used on some specific Linux-based devices. Root access allows you to do almost everything on the phone you’ve gained access to, like installing or uninstalling applications or changing the settings.

Root access is not all fun, and games as this process will lead you to the security architect of your operating system, which will be hard to deal with even if you’re a professional. So, it’s important to be careful with this process, else you will have to bear the consequences.

Jailbreaking (for iOS)

Jailbreaking a device means removing all the restrictions on that device that its manufacturer’s applied. This process works specifically for Apple devices. It lets you bypass the limitations and restrictions, so you can modify the software your way and make changes to the default program. It is also considered free booting, and Apple or any other company does not approve of it.

In summary, unlocking is primarily about freeing a device from carrier restrictions, rooting is specific to Android devices and involves gaining administrative access, while jailbreaking is specific to iOS devices and involves bypassing Apple’s restrictions for more customization. All these processes come with potential risks and may void warranties, so users should carefully consider the implications before proceeding.

It is advisable to always go for the safest method, unlocking your phone. Rooting and Jailbreaking are risky security exploitations that can cause serious problems.

Part 2: Is it Legally Allowed to Unlock Your Oppo F25 Pro 5G?

Every country has its own rules and regulations. Similarly, laws regarding unlocking your phones are different in different countries. However, after sessions of deliberations and consultations, the US has declared it legal to unlock your phone.

In order to legally unlock your phone, you must make sure your phone service contracts, payments, and dues are cleared. You must be the sole owner of your phone. Once your phone is eligible and falls under the requirements, you will be given an “Unlock Code” to proceed further.

Part 3: Free Ways to Perform Android SIM Efficiently

This part of the article will briefly explain some efficient and free-of-cost ways to unlock your SIM.

Method 1. Unlock your SIM through GalaxSim Unlock

GalaxSim is an effective application for unlocking your SIM. Its user-friendly interface is designed in such a way that every other person can use it even if you have no knowledge of tech. It automatically backs up data on Google Drive, and if there are errors, it detects them right away.

Here is a small step-by-step guide to using GalaxSim on Android, as it is only compatible with Galaxy series phones.

• Step 1. Launch GalaxSim

The first and foremost step is to install GalaxSim from Google Play Store on your Android device.

• Step 2. Phone Status

Once GalaxSim is downloaded, open the application and allow it to run on your device. Now, it will show you whether your phone and its systems are locked or unlocked.

• Step 3. Unlock your Phone

Under your phone’s status, click on “Unlock” to continue. After the process is completed, your phone will be unlocked successfully.

Click here

### Method 2. Unlock SIM through Free Code

FreeUnlocks is the most trusted phone unlocking website on the Internet. It is completely safe as the code is given to you safely and sounds on you on your email only. It is compatible with all phones as it is available online and free of all malicious software.

Click here


The following are the steps to use FreeUnlocks to get your free code.

• Step 1. Confirm your Device

Choose your device name and device model first. Then click on “Unlock Now” to start the process.

• Step 2. TrialPay for Free Code

Now you’ll be given two options on the screen, “PayPal” or “TrialPay”. If you want to do it free of cost, select “TrialPay” to proceed to unlock your device. However, it depends on your personal preference; you can select “PayPal” if you want to enjoy more features.

• Step 3. Remote Email

You’ll receive an email immediately, and all you have to do is, enter the unlock code, and there you have it, your SIM unlocked.

Bonus Tips: How to Unlock Android Screen Precisely with Dr.Fone Screen Unlock?

Wondershare Dr.Fone - Screen Unlock (Android) has yet, another time, taken the lead in this matter too. This convenient multifunctional software is a go-to software for everyone who has knowledge of tech as it provides solutions for your software and hardware problems under one roof. While it may seem like big trouble on your end, it’s just a matter of a few minutes for Dr.Fone to fix your issue.

safe & secure

Wondershare Dr.Fone is the best solution to unlock your Android device as it

• Removes all kinds of locks, be it fingerprint, password, unlock code or pattern, and PIN.
• Bypass Android FRP lock without a PIN or Google account.
• Compatible with almost all Android devices.
• A completely safe tool. No risk of hacking or virus attack.
• Very convenient and easy-to-use software for amateurs and professionals as well.

Moreover, Samsung and LG devices can be unlocked using Dr.Fone without losing any data, whereas this is not the case with other phones. In order to unlock the Android screen precisely with Dr.Fone Screen Unlock, you have to follow the given steps:

• Step 1: Install Wondershare Dr.Fone

Install Wondershare Dr.Fone on your PC and connect your Android device to your PC via cable.

• Step 2: Unlock your Android Phone

Select “Screen Unlock” on the home interface among the other given options. Once your PC detects your phone, another interface will be displayed on the screen. Now, select “Unlock Android Screen”.

• Step 3: Confirm your Device

Now, select your Device to proceed on. Dr.Fone will guide your Android device into the specific mode automatically.

• Step 4: Remove Password

Once your device model matches and your device enters the specific mode, the software will automatically start unlocking. This way, your password will be removed successfully, and you can easily unlock and access your Android device.

Part 5: Tip to Avoid the SIM Lock Issue

In order to avoid the SIM Lock issue, it is advisable to use unlocked phones. This will save you from long-term hassle as you will have the freedom to switch carriers and SIM cards whenever you like. On the other hand, if we talk about locked phones, they’re expensive and a headache to deal with because of the requirements and problems they come with.

If you’re concerned about a dual-SIM phone, then you can have one SIM pinned to a good quality carrier. The other SIM can be temporary and cheap. This is an amazing option for you if you’re traveling, as you’ll have the flexibility to change carriers for the temporary SIM no matter wherever you are.

Conclusion

As a crux, an unlocked phone is a better choice than a locked phone. We would personally advise you to go for unlocked phones as this will save your time and money. You will have much more freedom and flexibility for changing between SIM and SIM carriers. Whereas on the locked phones, you will be bound to one SIM. So, the next time you decide to buy a phone, give this article a read again.

Network Locked SIM Card Inserted On Your Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G device and is one of the most common errors in network locked SIM card inserted devices. During that time, the Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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 Oppo F25 Pro 5G 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.

1. 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.
2. Since nobody wants to purchase a locked phone, it is hard for someone to sell or gift the mobile.
3. 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.

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.