What Does ‘Enter PUK Code’ Mean And Why Did The Sim Get PUK Blocked On Oppo A78 5G Device

If your SIM card is disabled, you probably entered the incorrect PIN code too frequently. Your SIM locks itself after three to five wrong inputs, on average. Although it might be annoying, doing these guards against unauthorized access to your phone and personal data. If your cell phone is lost or stolen, PUK blocked will prevent prospective hackers from making calls.

Your mobile phone display can say “PIN blocked” or “Enter PUK code.” PUK stands for PIN Unblocking Key in the PUK code. The PUK code is seldom given to you when you receive your membership in the US. Contact Your Oppo A78 5G provider’s customer support if you don’t know your PUK code.

Part 1: Why Was My Sim Card Blocked?

1. 3 times incorrect Pin entered

Sometimes when you forget your pin and keep on entering the wrong one, you can get PUK Blocked. You can utilize three to five chances, and your sim gets blocked when you enter the incorrect pin in all of these attempts.

2. Wrong PUK code entered

Sims are frequently blocked; therefore, if you have your PUK, keep it in a secure location separate from your phone. This is because it is the key to unlocking your SIM. The SIM will be permanently disabled, and you will have to buy a new SIM card if you input the wrong PUK ten times in a row.

Part 2: What To Do When I Blocked My Sim Card?

Your SIM card has been disabled to protect your security if you enter three wrong PINs and your phone shows “SIM card banned” or “Enter PUK code”.

You must input a PUK (PIN Unlock Key) code to unlock your SIM card.

Go to your phone’s settings to customize your PIN code after using a PUK code to unlock your SIM card. Pick a PIN that is simple to remember.

If your PUK code was delivered to you by email:

You got an email with multiple codes, including PUK1, PIN2, and PUK2.

If your PIN is locked, use PUK1 to unlock it.

Only a few phones employ PIN2 and PUK2 codes to restrict access to certain SIM card functionalities.

PIN2: The default code for your SIM card; If this code has been altered, use the PUK2 code to restore it.

PUK2: Your PIN2’s unlock code if it has been blocked.

Part 3: How Can I Have My PUK Code To Unlock Sim Card?

1. Get it from sim card packaging

The packing box is the best and easiest place to look for the PUK code to unlock your SIM card.

You probably have memories of the flat plastic package you got when you bought a SIM card. Your PUK and default SIM pin code should be written on the package.

Please look around your home for the package and look on the back for the key. On some older packaging, it could be sealed behind a scratchable region, whereas on other, more recent ones, you might find it unsealed.

In either case, the correct PUK has 8 numbers and should be simple to enter to unlock your SIM card.

2. Have it from carrier website

In all honesty, I doubt I’ll ever be able to locate my SIM card package again, and I imagine most people feel the same way.

But happily, a lot of cell companies let you access your account on their app or website to check your SIM card PUK. Please log in to the appropriate website or app, then go to your profile to see whether anything about “PUK” is available there.

It shouldn’t be an issue if you were utilizing or signed in to the platform before your SIM was disabled. However, if not, you might not be able to access anything since you could be asked to input an OTP to verify your identity.

Please remove the SIM card and try again if you can’t access your phone to utilize the app or website because of the SIM lock. After receiving the PUK code, you can re-insert the SIM and input it.

3. Contact your carrier

It’s time to call customer support, which should be simpler for most individuals if none of the above options work for you. For example, your mobile service provider created your SIM card. Therefore, they have all the information you would require. Before they divulge anything to you, though, they should be able to verify your identity.

Use a different phone to call your customer service number and describe the issue. And following a series of inquiries, they should offer your PUK number as identification.

However, customer service won’t release the code if you can’t back yourself up. And at that point, there’s probably nothing further you can do. Therefore, make sure you have some information, such as your name, address, date of birth, etc., before you call them.

Part 4: Easy Tool For Sim Card Unlock

If you want to unlock your PUK blocked sim card, you can use a network unlock tool like Dr.Fone. With Dr.Fone - Screen Unlock (iOS) , you can remove the PUK block on your sim card instantly. You don’t have to contact your network carrier or search for the PUK code, as you can use your PC to unlock any sim card.

Dr.Fone enables users to unblock their sim cards within minutes. It is a fast, safe, and easy-to-use tool that works as a one-stop solution for any of your smartphone-related issues. Before you try to unblock your sim card with Dr.Fone, do remember that this feature is only for iPhones and iPads. Here is how you can use Dr.Fone to open your PUK blocked sim card.

• Open Dr.Fone on your PC. After launching the application, select the “Screen Unlock” tab from the homepage to access the “SIM unlock” tool.
• Next, select the “Remove SIM Locked” option on the next page. The sim unlock feature is only available for iPhones and iOS devices.

• Use a USB cable to connect your PC and iPhone. After you ensure that your device is connected, click on the “Start” option to begin the sim unlock process.

• Now, Dr.Fone will check your iOS device and show its information for verification. Click on the “Unlock Now” option if it’s correct.

• The iPhone sim unlock will not work without a jailbreak, so you have to do it before the system start removing the sim lock. You can follow the guide about how to jailbreak your iPhone provided by Dr.Fone. The unlock process runs well with devices of iOS 12 to iOS 14.8.1.
• Now, you have to finish three easy steps to set up your iPhone. First, extract the sim card from your device. And follow the following steps. After this, click on the “Continue” option.

• After you complete these steps, Dr.Fone will directly remove the sim lock on your device. You can view the progress on your screen. The process will not take a long time to complete, so you only have to wait for a few minutes.
• After Dr.Fone ends the sim unlock process, there will be no sim restrictions on your iOS device. It means you can use sim cards from any network carrier. Now, click on the “Done” option after your task is complete.

Conclusion

People who still have their SIM pack shouldn’t have trouble figuring out “how to acquire a PUK code to unlock a SIM card”. However, for those without it, getting in touch with customer service may be the only option. As long as your SIM card has accurate information, this process should be simple.

Once you have the proper PUK to unlock your SIM card , don’t be reluctant to write it down somewhere you can easily find it later. It might not be a terrible idea to store it on your Google Drive. This way, you will not see PUK blocked, as you know how to unlock PUK blocked sim card.

Top 10 Oppo A78 5G 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 Oppo A78 5G 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 Oppo A78 5G 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 Oppo A78 5G Device in a Flash

• Pattern, PIN, password, fingerprints & face screen lock can all be unlocked.
  Click here
  
• 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 Oppo A78 5G 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 Oppo A78 5G 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.

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 Oppo A78 5G

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 Oppo A78 5G device you want to unlock and the app generates a code for you to use in unlocking the Oppo A78 5G 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 Oppo A78 5G

Step 1. Visit the official website and click on Select Your Oppo A78 5G. 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.

Top IMEI Unlokers for Your Oppo A78 5G Phone

Anytime your device is locked for one reason or another, IMEI unlocking is often the easiest way to unlock the Oppo A78 5G device. Using your IMEI number there are several apps and tools that can unlock a completely a mobile device. Most of these apps are freely available on the different app stores. Some are free. Others will offer the service at a substantial fee. Because there are so many of them it can often be difficult to sieve through the mass of apps and find the right one for you. In this article we are going to provide you with 5 of the best IMEI unlocking tools for Android and 5 for iPhone users. This way it will be easy for you to choose one for you.

Part 1: Top 5 IMEI Unlokers for Android Phones

1. IMEI Unlock

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

This app works by using your IMEI number to remotely unlock a locked Android device. You can use it by using a SIM card on a different network than the one that is locked and just entering the IMEI code when prompted by the app. The app will proceed to unlock the Oppo A78 5G device and once this is done, you won’t be required to enter the code again.

Although it is not free, it is very easy to use and very effective. It also comes with a lot of great features such as social media integration and excellent customer service.

2. IMEI-Unlocker

Download Link: https://www.imei-unlocker.com/

This is an app that has been developed by legendary unlocking website imei-unlocker.com service. It works very easily. All you need to do is launch the app and the tap the unlock button from the dashboard, choose the Oppo A78 5G device and then enter the IMEI number of the locked device. It is also compatible with all Android devices including the newer models such as the Samsung Galaxy S5.

3. Unlock your Phone Fast & Secure

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

The major selling point of this app is that it supports a wide range of Android device. Using it however is not as easy as the ones we’ve seen above. You have to provide a lot of information about the Oppo A78 5G device before you can be provided with the unlocking code. Also, the app charges the user per unlocking code provided. The code is sent to the user’s email address which also further complicates the process.

4. Unlock Your Oppo A78 5G Instant

Download Link: https://instant-unlock.com/

This is another app that makes it very easy to use your IMEI number to unlock an android device. It supports a wide range of devices including Alcatel, LG, HTC, Motorola and many others. All you have to do is install the app and then provide your device’s information. The app will send you an email with the unlock code and instructions on how to use it.

5. Device Unlock

Download Link: https://www.t-mobile.com/support/devices/unlock-your-mobile-wireless-device

This one is fairly new although it does work well to unlock your mobile device. It is very easy to use and you can request an unlock code directly from the Oppo A78 5G device. The only drawback is that it only supports Samsung Avant devices.

Dr.Fone - Screen Unlock (iOS)

iPhone SIM Unlock to Work on Any Carrier Worldwide

• Support newly released models from iPhone 5S to iPhone X.
• Move to any network operator within minutes aimlessly without data loss.
• You can unlock an iPhone without an R-SIM.
• Compatible with most carriers, T-Mobile, Sprint, Verizon, etc.

3,981,454 people have downloaded it

Part 2: Top 4 IMEI Unlokers for iPhone

1. My IMEI Unlock

Link: https://myimeiunlock.com/

This is one of the most trusted unlocking service in the business. The services promises it can unlock any iPhone regardless of iOS firmware, boot-loader or baseband. It can also be used to unlock all iOS versions including iOS 9. Most of all they promise not to jailbreak your device while unlocking. It is also very easy to use. All you have to do is provide the Oppo A78 5G device’s details as well as the IMEI number and the do the rest.

2. iPhone IMEI

Link: https://iphoneimei.net/

Apart from offering you the chance to check your IMEI number, this service also unlocks iPhones. It very easy to use. All you have to do is select your iPhone model, the network carrier you use and then enter your IMEI number to unlock the Oppo A78 5G device. The site also allows you to easily pay via PayPal.

3. Let’s Unlock iPhone

Link: https://letsunlockiphone.services/

Yet another reliable service that easily unlocks your iPhone using the Oppo A78 5G device’s information and IMEI number. This services promises that the iPhone will be unlocked in just 2 days and the action is permanent- you won’t have to repeat the procedure at a future date. The service is also quite affordable as compared to the others.

4. Cell Unlocker

Link: http://www.cellunlocker.net/apple-iphone-unlock-solution.php

For this service you first begin by selecting your iPhone model and then entering your IMEI number. It is a great service that is also very easy to use. The site however only unlocks iPhones with specific network carriers and you should check that they support your carrier before placing an order.

Conclusion

Now that you have at least 10 solutions to choose from, we hope you are able to make use of your IMEI number to unlock your device. You have to part with some cash to use them but if it means getting your device working normally again, we think its worth the investment. Let us now how it works out for you.