Network Locked SIM Card Inserted On Your Oppo A78 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 A78 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 A78 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 A78 device and is one of the most common errors in network locked SIM card inserted devices. During that time, the Oppo A78 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 A78 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 A78 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 A78 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 A78 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 A78 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 A78 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 A78 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.

Click here


• 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 A78 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 A78 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.

The Best Android SIM Unlock Code Generators: Unlock Your Oppo A78 Phone Hassle-Free

In today’s world, smartphones have become an essential part of our lives. They offer a lot of convenience, but sometimes they can be a bit of a hassle. One of the biggest headaches that smartphone users face is carrier locking. This is when your phone is locked to a specific carrier, and you are unable to use it with any other carrier’s SIM card.

If you’ve tried Googling for solutions, you’ll realize it may take a long time to find a reliable solution. In effect, what you’re looking for is an Android SIM unlock code generator to provide you with a free unlock code. Some free solutions may have hidden costs, so you must be careful in choosing the right Android sim network to unlock pin software . Here are seven free Android unlock code generators to consider.

Part 1. What is Android SIM Unlock Code Generator?

Android SIM unlock code generator is a software or application that generates unlock codes for Android phones. These codes are used to unlock the phone’s SIM card, enabling the phone to work with any carrier’s SIM card. The software is designed to be user-friendly and easy to use, with step-by-step instructions to guide you through the process.

You may be interested in: How to Unlock Phone Free with IMEI Number

Part 2. How Does Android SIM Unlock Code Generator Work?

To use the Android SIM unlock code generator, you will need to download and install the software on your computer. Once installed, you will need to connect your Android phone to the computer using a USB cable. The software will then detect your phone and check if it is eligible for unlocking.

If your phone is eligible for unlocking, the software will generate an unlock code. You will then need to enter this code into your phone’s keypad to unlock the SIM card. Once the SIM card is unlocked, you will be able to use your phone with any carrier’s SIM card.

Part 3. Benefits of Using Android SIM Unlock Code Generator

There are several benefits of using Android SIM unlock code generator. Some of these benefits are:

• 1. Freedom to choose your carrier

When your phone is carrier locked, you are limited to using only the carrier that the phone is locked to. This can be a problem if you travel frequently or want to switch to a different carrier. By unlocking your phone’s SIM card, you will be able to use any carrier’s SIM card, giving you the freedom to choose the carrier that best suits your needs.

• 2. Cost savings

By unlocking your phone’s SIM card, you can save money on roaming charges when traveling. Instead of paying expensive roaming charges, you can simply purchase a local SIM card and use it in your unlocked phone. This can save you a lot of money in the long run.

• 3. Resale value

An unlocked phone has a higher resale value than a carrier-locked phone. This is because an unlocked phone can be used with any carrier’s SIM card, making it more attractive to buyers.

• 4. No need to buy a new phone

If you want to switch to a different carrier, you may be tempted to buy a new phone that is compatible with that carrier. However, by unlocking your phone’s SIM card, you can use your existing phone with any carrier’s SIM card, saving you the cost of buying a new phone.

Part 4. 4 Android SIM Unlock Code Generators Reviews

There are several Android SIM unlock code generator software available on the internet. Here are some of the most popular ones:

Tool 1: NokiaFree - Powerful SIM Unlock Code Calculator

Even though the name suggests this tool is meant for Nokia phones, the truth is that NokiaFree is a powerful utility that can unlock other brands of phones as well. The software can be downloaded for free, and it is always better to download the latest version from their website. The process of finding your sim network unlock pin is so simple, and you’ll wonder why you didn’t try this utility earlier.

How It Works

All that is needed is the IMEI number from Your Oppo A78 to generate an unlock code. Just type in *#06# into your mobile. The IMEI code is then displayed. Copy the 15-digit IMEI code and enter it into the software. You’ll get a list of unlocking codes. Try a maximum of four codes to unlock your mobile.

Pros

• Software is very easy to install.
• User-friendly interface with easy-to-find menus and buttons.
• Supports many other phone brands, including Nokia, Sony, Samsung, and Siemens.
• Easy-to-follow simple instructions.
• Provide easily available basic information to get your unlocking code.

Cons

• Requires an internet connection to function (web-based tool).
• The name suggests the tool is useful only for Nokia mobiles.

Review

The NokiaFree Android SIM unlock code generator is getting better all the time. You now have access to a tool that is easy to use, and quickly unlocks restrictions on a wide range of mobiles, and anywhere in the world. An added bonus is it comes to you totally free of cost. The download takes very little time, and this Android unlock code generator does not interfere with other functions.

Tool 2: WorldUnlock Codes Calculator

As the name suggests, the WorldUnlock Codes Calculator can unlock your phone in any location with just a few clicks. It’s easy to find a reliable code generator, but you’d have to pay for receiving a code in variable amounts. In other words, there are no fixed charges to locate your phone unlock code from a dealer. However, this software is totally free and requires only basic details to provide the unlock code.

How It Works

Just locate the IMEI number by typing in *#06# into your phone. Enter the code into the software along with basic details like country of purchase and service provider. That’s it.

Pros

• Free and safe software download.
• The software is updated regularly. You can download the updated version.
• Very popular with worldwide users.
• Works with the latest Windows 10 version.
• Unlocks Maxell, Nokia, Motorola, Siemens, Samsung, LG, Vitel, and AEG mobiles.

Cons

Works only with Windows-based operating systems.

Review

The WorldUnlock Codes Calculator can be easily downloaded to a Windows computer working on the latest operating system. The system generates several codes, so you’re sure to find one that unlocks your phone. Many users are likely to use their services, considering it is a Windows-based system.

Tool 3: UnlockMe For Reliable Android SIM Unlock Solutions

If you own a Nokia phone, UnlockMe will provide all the necessary information to unlock your phone. You can browse through the latest information on various topics related to Nokia and other phones - likely to prove useful in the long run. It is a known fact some phones are easier to unlock than others, and a dedicated site focusing on providing absolute solutions to Nokia releases is pretty useful. Besides checking out the latest information, you can get free unlock codes with this Android unlock code generator.

How It Works

Check If your Nokia phone is listed on the site, then follow simple instructions to get your SIM to unlock code.

Pros

• An exhaustive list of supported Nokia DCT4 and Nokia DCT3 models.
• An interactive system where users have to enter minimum information about the model, 15-digit IMEI number, and network provider.
• Provides detailed instructions on video sites to help users complete the process.
• Dedicated sections compiled for Lumia 800 and 710, as well as iPhones.
• Constantly expanding to serve worldwide users.

Cons

At the time of this review, the site was mainly providing Android SIM unlock code generator to a specific list of countries.

Review

UnlockMe works really well with users in the United Kingdom and its listed countries. It is expanding quite rapidly, so keeping in touch with this site makes sense. It does provide alternate solutions to finding unlocking codes at present, making it a worthwhile site to check out. If you are unable to find the unlock code this time, you’re likely to find a solution the next time you visit this site.

Tool 4: UnlockItFree - Powerful Worldwide SIM Unlock Code Provider

With many users asking for unlock codes, UnlockItFree has developed from a free domain to a powerful worldwide service provider with better features. Nearly 90,000 phones have been unlocked with codes provided by this website. This simple Android unlock code generator packs a punch with accurate and advanced technologies embedded into its unlocking process.

How It Works

A simple process is used to uncover free unlocking for even the Nokia DCT4 and DCT3 phones via remote code. Other phones listed on the website also require users to follow easy steps to unlock SIM codes.

Pros

• Totally anonymous unlocking process.
• Gain unlocking codes just by sharing this system with others.
• Completely legal with uniform codes across the globe.
• Customer service provided on this free website.

Cons

After the first and last codes, users have two more attempts to unlock their phones.

Review

Unlockitfree has grown into a powerful site over a period of time. By offering stable services, this reliable unlocking tool works well on most phones irrespective of location. Considering the number of phones that have found solutions on this website, it is likely this unlocking tool will continue to grow with informative feedback from its customer service cell. An Android SIM unlock code generator that works on most phones and across the globe is just what you need to find instant and free unlock codes.

Easily Unlock Your Oppo A78 Device SIM

Is your Android phone SIM locked? Having an unlocked device can have its benefits but most of the time most people don’t even know whether their device is SIM locked or not. In this article we are going to address this issue. We are going to begin by helping you find out whether your phone is locked or not and if it is, how you can sim unlock the Oppo A78 device and enjoy the benefits of an unlocked phone.

Part 1: How to Know if your Android is SIM Locked

It is important to note that not all phones are SIM locked. You can find out if yours is by checking the Oppo A78 device’s documentation. If you see the words “unlocked” on the initial receipt then you know that the Oppo A78 device is not SIM locked.

Another easy way to find out is to ask your carrier if the Oppo A78 device is locked on to their network. You can also just try inserting another carrier’s SIM into your device. If it doesn’t work, you will know that the Oppo A78 device is SIM locked.

If you bought your device from a third party re-seller such as Amazon you are more likely to be in possession of an unlocked device.

Part 2: How to SIM Unlock your Android Device

If you find that your SIM is locked, here’s a few things you can do to unlock the Oppo A78 device.

Avoid all of the apps on the Google Play Store that promise to unlock your device, most of them don’t work and may even harbour a lot of Trojans and malware that will cause further problems for you and your device.

There are safe and very legal ways to unlock your device. Just try one of the following.

Ask your Carrier to Unlock your Device

This is the best option when you want to safely unlock your device. By February 2015, American cell phone owners got the option to request their carriers to unlock their device for them. Before that the law didn’t allow for carriers to unlock SIM cards in the United States. This unpopular law was reversed following a similar move by the European Union in 2013. The same law also requires that the carriers inform customers every month whether their device is eligible for unlocking.

If your device is eligible for unlocking, all you need to do is contact the carrier provide and request for the sim network unlock pin . But if your Smartphone was bought on a contract, you may need to pay a termination fee to break the contract of you want to unlock the Oppo A78 device before the contact term expires. For Smartphones that are not on contract, you have to wait 12 months from the date of purchase and ensure that your bill is paid before the carrier can give you the unlock code.

How to Unlock your Android Phone

To begin with, you need to confirm your IMEI number. Dial *#06# on your device and the IMEI number will appear on the screen. Copy this number to a secure location or wrote it down somewhere.

The next step is to find a reputable service that will unlock your Android device for you. This is action you should take only if you are absolutely desperate and your carrier can’t unlock your device for you. This is because many of these sites are unregulated and many of them are not reliable.

You should also know that many of them will charge a certain amount for your service. You can try https://www.safeunlockcode.com/ which is one of the more reputable ones we have found.

You will need to enter the IMEI number as part of the information you need to provide before they can unlock your device.

Part 3: Troubleshooting Android SIM Unlock

There are lots of issues you may face when you try to unlock your device. The following are just some of the troubleshooting actions you can take if you encounter these problems.

Unlocking Code Fails to work

If you asked your carrier to unlock your device for you, chances are that they sent you a code. If the unlocking code fails to work double check that the IMEI number you used is the correct one and ensure that you purchased that device from that carrier and then try again.

Samsung Device Freezes during unlocking

If your device freezes during the unlocking process it typically means that you entered wrong unlocking code too many times. In this case you need to contact the carrier for a Master Code.

My LG device won’t unlock

There are some LG models that cannot be unlocked. These models include LG U300, LG U310, LG U8180, LG U8330, LG U8120, LG U8360, LG U8380, LGU880, and LG U890. If your device is one of these it can’t be unlocked by your carrier. You may need to look into other ways of unlocking your device.