In 2024, How To Fix OEM Unlock Missing on ZTE?

How To Fix OEM Unlock Missing on ZTE Nubia Flip 5G?

Original Equipment Manufacturer (OEM) Unlock is a function on Android devices. It allows you to unlock your phone bootloader. A bootloader or bootstrap loader gathers the operating system files, loads them into memory, and hands over control, essentially starting your device. Unlocking the bootloader assists you in installing custom ROMs, flashing custom kernels, and rooting your phone.

However, this freedom comes with some trade-offs. Most manufacturers will void your warranty if you unlock the bootloader, and it can also make your phone face higher risks of malware and other security threats. Additionally, it can be difficult to relock the bootloader once you unlock it.

If you encounter the OEM unlock missing on your Android phone despite wanting to unlock your bootloader, this article can help. You will learn the step-by-step guide for the different methods to fix the missing OEM unlock option. Before diving into solutions, let’s explore why this option might be unavailable in the first place.

Part 1: Why Is OEM Unlock Missing on Your Device?

Finding that OEM Unlock is missing on your Android phones can be frustrating, particularly if you plan to modify your software or install a custom ROM. But don’t worry. There are several possible explanations for this. Let’s explore some of the most common reasons:

Manufacturer Restrictions

The Missing OEM Unlock option can often be due to restrictions imposed by your device’s manufacturers. They may intentionally remove this option to safeguard device security and compatibility. It is common with carrier-locked devices. As a result, the OEM Unlock option may not show.

Bootloader Already Unlocked

In some cases, the Android OEM Unlock Missing issue arises when the bootloader has already been unlocked. Relocking the bootloader might make the option reappear. But exercise caution as this process can erase device data.

Developer Options Not Enabled

It might seem obvious, but sometimes the simplest things get overlooked. The OEM Unlock option can only be accessed from within Developer Options. If this menu isn’t enabled, you won’t see it.

Carrier-Locked Devices

The OEM Unlock Missing issue can also occur if your device is carrier-locked. Carriers often impose restrictions to prevent users from switching networks, and bootloader unlocking is one way to do that. Unfortunately, the missing OEM Unlock option is usually intentional, and unlocking your device can be more complicated.

Security Features

Enhanced security features, like Samsung’s KNOX, can sometimes conceal the OEM Unlock option. Temporarily turning off these features might show the option, but it’s crucial to be aware of the potential security implications of doing so.

Corrupted Bootloader

A corrupted bootloader can also lead to the Android OEM Unlock missing problem. The bootloader plays a role in the boot process, and if it’s damaged, it might not display the necessary options. This can be caused by software glitches, failed flashing attempts, or even hardware issues. In this scenario, you might need to consult your device’s manufacturer or a technical specialist to help repair or re-flash the bootloader.

Connectivity Issues

A poor connection between your device and computer can also prevent the OEM Unlocking from showing up. Check your cables and try using different USB ports to ensure a stable connection.

Part 2: How To Enable Missing OEM Unlock Without a Password?

Unlocking your phone’s bootloader (OEM Unlock) varies across models and brands. Some need a passcode or PIN after rebooting the phone, while others don’t. Even if your phone doesn’t require a separate password, your existing screen lock (password, PIN, pattern) will usually be needed to enable the missing OEM unlock option.

But what if you forgot that, too? Wondershare Dr.Fone - Screen Unlock can help bypass forgotten passwords and unlock your phone even if you don’t have the technical knowledge. Here’s a quick breakdown of its key features in this area:

Success Rate

High success rate for bypassing various lock screen types, including PIN code, pattern lock, passwords, and fingerprints.

Ease of Use

Provides a concise and intuitive interface that guides users with clear instructions and on-screen prompts.

Comprehensive Features

Dr.Fone - Screen Unlock tool can remove the Android phone lock screen without resetting your Samsung or LG device. It can also help you bypass Google Factory Reset Protection (FRP) on mainstream Android brands.

Extensive Device Compatibility

Aside from Samsung and LG, it covers a wide range of popular Android brands like Vivo, Huawei, Xiaomi, Oppo, etc.

Regain control in minutes with Dr.Fone. First, download the app to your desktop and install it. Once it’s up and running, launch Dr.Fone and prepare to unlock your device with ease. You’ll find detailed instructions below – even if you don’t know your phone’s lock screen, Dr.Fone has you covered.

Step 1: Select Screen Unlock from the Toolbox homepage. Then, establish a connection between your locked Android device and your computer using a USB cable.

Step 2: Specify the ZTE Nubia Flip 5G device type for screen lock removal.

Step 3: Select Unlock Android Screen to proceed.

Step 4: Choose the brand of your phone from the supported brands.

Note:

The following steps will vary based on your device’s manufacturer. Please refer to the instructions on your screen to proceed into Download or Recovery mode.

Step 5: The screen unlock process is underway. If it encounters trouble, click Try Again. Once Dr.Fone successfully unlocks your Android device, tap Done.

Now that you’ve regained access to your device thanks to Dr.Fone - Screen Unlock, you can move forward with enabling the OEM unlock missing option. Next up, we’ll guide you through the steps in several ways. Let’s start with the Developer options.

Part 3: How To Enable OEM Unlock Missing From the Developer Options?

Developer Options, a hidden menu in Android, offers advanced features like app debugging and custom ROM installation. But if the Android OEM unlock option is missing, you can’t unlock your device’s bootloader. Below is a step-by-step guide for you so the OEM unlock missing option will show in the Developer Options. Remember, this process may erase your device data, so a complete backup is essential before proceeding.

Step 1: Open the Settings app on your Android phone.
Step 2: Navigate to About Phone at the bottom of the list, then tap Software information.

Step 3: Tap on the Build number repeatedly (7 times) until you see a message saying, “You are now a developer!“ or similar.
Step 4: Go back to Settings > System and find the Developer options menu.
Step 5: Scroll down and tap the toggle switch next to Enable OEM Unlock to turn it on.

Step 6: A warning message explaining the risks of turning on the OEM unlock will appear. Read it carefully and tap Enable if you want to proceed.

Step 7: Enter your PIN or password to confirm the unlock when prompted
Step 8: Your device will reboot, and OEM Unlocking will be enabled.

Part 4: How To Fix OEM Unlock Missing by Adjusting Date and Time?

Some manufacturers intentionally delay the availability of the OEM unlock after a software update for security reasons. Changing the date to a past date before the update rolled out can trick the system into displaying the option, as it thinks the update hasn’t happened yet. It is a temporary fix, and the option will likely disappear again later when the ZTE Nubia Flip 5G device automatically syncs the correct date.

If you intend to try this method, follow these steps to enable OEM unlock missing or greyed out after an Android update:

Step 1: Open the Settings app.
Step 2: Go to System or General management, depending on your Android version.
Step 3: Tap on Date and Time.
Step 4: Turn off Automatic date and time.

Step 5: Tap on Set date and choose the desired older date from the calendar.
Step 6: Tap on Set time and choose the desired time from the clock.
Step 7: Tap on Done to save the changes.
Step 8: Go back to the Developers options and turn off the Auto update system option.

Step 9: Go to Settings > Software update, then turn off Auto download over Wi-Fi.

This method should enable the OEM unlock missing issue. Otherwise, proceed to the next section for another solution.

Part 5: How To Fix OEM Unlock Missing by Removing SIM Card?

Certain carriers restrict bootloader unlocking on their devices to ensure compatibility and prevent unauthorized modifications. For these phones, unlocking the SIM card becomes crucial before you can toggle the OEM unlock option. Here are the steps to fix the OEM Unlock missing or greyed out using SIM card removal:

Step 1: Use the SIM ejector tool (often included with your phone) or a small pin to push the tray out.
Step 2: Go to Settings > General Management > Reset, then select Factory data reset. Enter your PIN or password if needed.

Step 3: Review the warning and tap Reset to confirm.
Step 4: Once the reset is complete, your phone will restart. Connect to Wi-Fi when prompted.
Step 5: Skip any prompts to log in to your Google or email account. Then, repeat the process to open the Developer Options in the previous sections.

Conclusion

Having the OEM Unlock missing or greyed out can leave Android users feeling locked out of customization possibilities. Fortunately, this article has outlined helpful solutions like enabling the Android OEM Unlock missing option via the Developer Options. You can also try other methods above, like adjusting date and time settings or even a sim card removal trick. For those facing forgotten lock screens, we’ve offered guidance on bypassing them using the Dr.Fone - Screen Unlock tool to access the necessary phone settings.

While these methods provide a solid foundation, it’s always wise to research steps specific to your phone model. And never forget – caution is key. If things get technical, don’t hesitate to seek help from online communities or professional repair services.

Tips: Forget your device password and can’t get access to it? No worries as Dr.Fone is here to help you. Download it and start a seamless unlock experience!

A Complete Guide To OEM Unlocking on ZTE Nubia Flip 5G

Android, known worldwide as a major player in phone operating systems, stands out for its flexibility and open-source nature. This allows users to customize their devices extensively. However, despite this openness, certain features and capabilities can still be locked or restricted, either by Google or the ZTE Nubia Flip 5G device manufacturer.

For those looking to truly unleash the full potential of their Android device, an OEM unlock is an essential step. This article will delve into the process of OEM unlocking on Android, guiding you through its benefits and how to safely perform it.

OEM lock might sound like technical jargon to many. However, it’s a key concept for those who wish to dive deeper into Android customization. OEM stands for Original Equipment Manufacturer. Unlocking in this context refers to removing restrictions made by the manufacturer on the ZTE Nubia Flip 5G device.

This process allows you to gain deeper access to the ZTE Nubia Flip 5G device’s software. Thus, OEM unlocking is often required for customizing or modifying the system at a more advanced level.

Why Enable OEM Unlock?

The primary reason to enable OEM unlocking is to gain the ability to root your device or install custom firmware, also known as ROMs. Rooting is the Android equivalent of jailbreaking. It allows users to access and modify the ZTE Nubia Flip 5G device’s software at the deepest level.

This can enable the installation of apps and software that require more permissions than what is typically available. On the other hand, custom ROMs can change your device’s interface. They can also add features not available in the stock version of Android.

Pros and Cons of OEM Unlocking

Here are some great things you can get when you allow OEM unlock.

The most significant advantage is the ability to customize your device far beyond what’s possible with standard settings.
Root access. It allows for rooting the phone enabling advanced features and apps.
Custom ROMs. Users can install different versions of Android or entirely new operating systems.

On the other hand, here are some cons that you must consider before performing the process on your phone:

Security risks. Root access can make your device more vulnerable to malware and hacking.
Void warranty. OEM unlocking often voids the manufacturer’s warranty.
Potential for bricking. Incorrect procedures can render the ZTE Nubia Flip 5G device unusable, known as ‘bricking’.

Understanding the Risks

It’s crucial to understand that OEM unlocking is not without its risks. It does open the door to several customizations and tweaks. However, it can also compromise the security of your device. There’s always a chance of bricking your phone, especially if the unlocking process isn’t followed correctly or an unstable custom ROM is installed.

Additionally, most manufacturers will void your warranty once you unlock the bootloader. This leaves you without support in case something goes wrong. So, in the next sections, you’ll be guided through the steps of OEM unlocking. You’ll also learn how to do it safely, ensuring you make the most out of your Android device.

Part 2: How To Enable OEM Unlock on Your Android Phone

Enabling OEM unlock can feel like stepping into uncharted territory. Still, it’s relatively straightforward if you follow the right steps. Before you start, it’s important to remember that the exact process can vary slightly depending on your device’s brand and model. However, the general steps are usually similar across most Android devices.

Step 1: Before proceeding, ensure you back up all important data. Enabling OEM unlock may require a factory reset, which erases all data on the ZTE Nubia Flip 5G device.
Step 2: Go to your phone’s Settings > About Phone. Then, tap on the Build number seven times. You should see a message that says you’re now a developer.
Step 3: Find and select Developer options on Settings. Then, tap OEM unlocking. You might need to enter a PIN or password.

Here are some common links where you might find the needed PIN or password:

After these steps, your device’s bootloader is now unlocked, and you can proceed with rooting or installing custom ROMs. Remember that this is a significant change to your device’s system, and it should be done cautiously and ideally only if you’re comfortable with potential risks.

Part 3: What Can You Do After OEM Unlock?

Unlocking your phone’s OEM opens up a world of possibilities. It allows you to customize your device beyond what’s available in its factory settings. This newfound freedom, however, comes with its own set of responsibilities and risks. Here’s what you can do after having your phone OEM unlocked.

Root Your Device

Rooting is akin to having the master key to your device’s software. It allows you to gain superuser access, enabling modifications and access to system files that were previously restricted. With rooting, you can:

Remove pre-installed apps or bloatware.
Customize system settings and UI elements.
Enhance performance or battery life through underclocking or overclocking the CPU.

Flash a Custom ROM

A custom ROM is a new operating system you can install on your device. This is one of the most popular reasons for OEM unlocking. Custom ROMs offer:

The latest Android updates, even for older devices, are no longer supported by manufacturers.
New features and customization options that aren’t available in the stock ROM.
Potential performance improvements and unique user interfaces.

Enjoy High Customization

With an OEM unlocked device, the sky’s the limit regarding customization. You can:

Install custom kernels for better performance and battery life.
Use powerful apps that require root access for advanced device management.
Customize everything from the boot animation to the layout of your UI.

However, it’s crucial to proceed with caution. Rooting and installing custom ROMs can void your warranty and, if not done correctly, can turn your device into an expensive paperweight (a state often referred to as “bricking”). Always use reliable sources for your custom ROMs and root-access apps.

Bonus: How To Unlock Your Android Screen When You Forgot Password

Forgetting the password to your Android phone can be a stressful experience. It locks you out of your device. It cuts your access to personal data, contacts, and essential apps. However, aside from OEM unlocking, learning the skill of screen unlocking is incredibly useful in such situations. It’s not just about regaining access. It’s about harnessing control over your device during forgetfulness or emergency.

Wondershare Dr. Fone’s Screen Unlock (Android) will save you in these situations. It’s designed to unlock your phone without requiring a factory reset. It saves your data from being erased. This feature supports unlocking patterns, PINs, passwords, and fingerprints, offering a comprehensive solution for regaining access to your device.

Dr.Fone - Screen Unlock (Android)

The Best UnlockJunky Alternative to Bypass FRP and Solve Your Screen Locks

Remove all Android screen locks (PIN/pattern/fingerprints/face ID) in minutes.
Bypass the FRP lock of Samsung without a PIN or Google account.
Everyone can handle the lock screen without any tech knowledge.
Provide specific removal solutions to promise good success rate.

4,008,671 people have downloaded it

How To Perform Screen Unlock With Dr.Fone

The process is straightforward. It involves connecting your device to a computer and running the Dr.Fone software. Then, you’ll follow simple on-screen instructions. Learn how to do those below:

Step 1: Go to Toolbox > Screen Unlock. Connect your Android device with your PC.

Step 2: Select Android on this page.

Step 3: Select Unlock Android Screen.

Step 4: Select your device brand.

Step 5: Click Remove without Data Loss.

Step 6: After confirming device details, type “000000” to execute the operation.

Step 7: Follow the on-screen instructions for putting your device into download mode. Then, wait for the process to finish.

Step 8: Once complete, click Done. If your device still isn’t accessible, click Try again.

Conclusion

In wrapping up, you’ve explored the ins and outs of “what is OEM unlock” in the Android world. It’s a key to opening up a trove of customizability on your Android device. It lets you tweak and tailor your phone to your heart’s content. But remember, with great power comes great responsibility.

Diving into OEM

How to Change Lock Screen Wallpaper on ZTE Nubia Flip 5G

Every smartphone user wants their lock screen wallpapers to be the finest quality. Since the ZTE Nubia Flip 5G device comes with a generic lock screen wallpaper on itself, changing it is necessary. Regardless of your Android device, the need to change the lock screen wallpaper on Android is significant. If so, the article will provide two diverse techniques familiar to any Android device.

Along with the basic methods, the article will redirect its discussion to changing the lock screen wallpaper for different brands. Find more about how to change the lock screen wallpaper on Android with the available methods and techniques to bring aesthetics to your device.

Part 1: How To Change Lock Screen Picture on Android Phone With 2 Common Methods

Every Android smartphone has its interface to follow while changing the lock screen wallpaper or screen saver of the ZTE Nubia Flip 5G device. However, before we dive into the ZTE Nubia Flip 5G device-specific details, let’s dissect the two common methods to change the lock screen wallpaper on Android:

Method 1: Pressing Home Screen Method

The first thing to try for changing the lock screen wallpaper includes the long press technique. This technique is available for almost all Android devices, a basic approach to changing lock screen wallpapers. To know how it is done, follow the steps provided below:

Step 1: As you unlock your Android smartphone, press the clear region until the home-screen options appear on the front.

Step 2: Select the “Wallpaper” option in the available buttons to lead to another window showing different wallpapers.

Step 3: Out of all the wallpapers, select any of them and tap on the “Apply” button to set it as your lock screen wallpaper.

Method 2: Using Your Gallery

You can also set your favorite picture as the Android lock screen wallpaper from the settings provided in your gallery. To know how you can utilize your device’s Gallery, look into the steps provided next:

Step 1: Access the menu of your Android device and locate the “Gallery” app in the available options. Continue to locate your respective photo in the “Albums.”

Image name: lock-screen-wallpaper-on-android-3.jpg

Image alt: access the gallery

Step 2: Choose and open the image on the screen, and continue to select the “Three-Dotted” icon on the bottom-right of the screen.

Step 3: On selecting the option of “Set as wallpaper,” you will apply the particular image from the Gallery as your lock screen wallpaper.

Part 2: How to Change Lock Screen Wallpaper on Different Brands of Android Phones

The provided methods in the above part are comprehensive in changing the lock screen wallpaper of any Android smartphone. This, however, is not the same and is true for every Android device in the market. Since the difference in operation brings a clash for many users, the need for an idea for different smartphone brands is essential.

For this part, we will bring a guide explaining how to change the lock screen wallpaper on Android of different brands:

For Samsung Users

Step 1: On unlocking your Samsung, hold the empty space on your home screen to open a set of options. Select “Wallpapers” from the available list and continue to the next screen.

Step 2: Choose the option of “My wallpapers” or “Gallery” from the available list and select the wallpaper of your choice. As you select one, you will have to set it as your “Home screen,” “Lock screen,” or wallpaper for both screens.

Step 3: Once you observe the image on the preview window, tap on the button on the bottom to set it as your lock screen wallpaper.

Step 1: As you access the home screen of your Google Pixel, continue to hold the space. This will open a list of options where you must tap on “Wallpaper & style.” Continue to select the “Change wallpaper” option to bring new colors to your Google Pixel.

Step 2: On the next screen, select any particular category you want to set the lock screen wallpaper. For instance, if you selected “My photos,” choose your image and preview it on the following screen.

Step 3: To proceed, specify where you wish to set it as your wallpaper. As the options appear on the front, select the “Lock screen” option and continue to set your wallpaper.

For Motorola Users

Step 1: Lead into the “Settings” of your Motorola device and look for the “Wallpaper & style” option in the list.

Step 2: Select any options appearing on the next screen that defines the location from where you will add the new wallpaper. Selecting a particular wallpaper from the available options leads to the “Preview” screen.

Step 3: Continue to select the “Lock Screen” option on the preview screen and tap on the “Tick” icon at the bottom. To confirm, tap “Lock screen” to change the wallpaper on the lock screen of your Motorola.

Click here

![confirm the lock screen wallpaper](https://images.wondershare.com/drfone/article/2023/03/lock-screen-wallpaper-on-android-14.jpg)

Step 1: Launch the “Settings” application on your OnePlus smartphone and continue to the “Personalizations” option.

Step 2: On the next screen, continue to the “Wallpapers” section and go through the available media to select a new wallpaper.

Step 3: As you select a particular wallpaper and continue to the preview screen, select the “Apply” button and proceed to choose “Lock Screen” from the pop-up menu.

Part 3: Top 10 Download Sites About Cool Screen Wallpaper on Android

What if you feel that you do not have the coolest screen wallpaper that you can change on your Android device? Before changing your Android lock screen wallpaper on your device, find a unique option that can be easily replaced. Instead of limiting yourselves to the options available on the ZTE Nubia Flip 5G device, you can consider moving to different download sites for downloading the coolest lock screen wallpaper:

1. Zedge

Zedge is one of the most premium websites for accessing wallpapers for Android devices. With accessibility to content from exclusive artists, Zedge presents the best personalization options to its users. For effective wallpaper creation, you can add your creativity to bring in the best results for your device.

2. Interfacelift

For exclusive access to free wallpapers of multiple categories, Interfacelift provides some impressive and high-quality results. This intuitive wallpaper site provides some captivating options. Along with that, it asserts a special force on photographs of landscapes, which makes it a great site.

3. Unsplash

Known for keeping royalty-free, high-quality content, Unsplash can be a great Android wallpaper site. Download your favorite wallpapers that will perfectly suit your Android device. Along with its smooth interface, Unsplash offers diversity with its dedicated Unsplash+ plan.

4. Mobile9

For variety, you can always go for Mobile9. This unique, expressive, and productive wallpaper site provides the best Android wallpapers. Following this, it offers multiple diversity of content, including ringtones and books. However, to get your hands on the finest quality wallpaper, do consider trying the site.

5. Dribbble

If you seek the best design for your Android lock screen, Dribbble provides the finest quality. Out of the 10,000+ designs, you can find your choice. Along with that, the site service also presents the wallpapers in dedicated categories. Searching for the right Android lock screen wallpaper gets easy in such an environment.

6. Wallpapers.com

For a service that provides dedicated Android lock screen wallpapers, Wallpapers.com holds a good position. With the finest wallpapers to use on the Android device, you can also customize the available wallpapers. Dedicated categories make it easy for users to select their favorite wallpaper from the 1000+ options.

7. Pexels

There are very few websites that offer the finest quality wallpapers for free. Pexels, being one of them, displays a great interface for users with sub-categorization. With descriptions for every wallpaper, you can select the best one for your device. Find a categorized section of more than 70,000 wallpapers on this platform.

8. Pixabay

Who won’t have heard of Pixabay as a haven for lock screen wallpapers? This platform provides a different perspective on wallpaper search. To find the best option, you can diversify your search according to orientation, size, and color. This makes your search much easier and swift for changing the Android lock screen.

9. 500px

To access the best wallpapers in the world, 500px is a good platform to keep in mind. While it helps a wide community fulfill their tasks, it can be a purposeful option. For diverse operability in the site, users can also sell their work into a global marketplace.

10. Wallpaperswide

From desktop to Android wallpapers, Wallpaperswide holds a diverse set of options. This platform is designed to provide a diversity of categories to its users. With a simple interface, it is a great option for gathering content.

Bonus Part: How To Unlock Android Screen if Forgotten the Password

Although you have learned how to change the lock screen wallpaper on Android, multiple complications can arise. One such problem that can occur on your device involves it getting locked. If the ZTE Nubia Flip 5G device gets locked, you cannot use it. For an Android whose password is locked, you will require a platform to amend the problem.

Dr.Fone – Screen Unlock (Android) provides a complete platform to unlock the Android device. This is the right place to go if you seek to remove such locks from your device within minutes. With the option of bypassing any screen lock, it can protect your device’s data.

Such options make it the finest platform to resolve issues with the Android device. To know how one can unlock their Android device with Dr.Fone, look through the provided steps:

Step 1: Open Screen Unlock Tool

You need to download and launch Dr.Fone on your computer and continue to the “Screen Unlock” tool. On accessing the tool, connect your Android device with a cable.

Step 2: Start Unlocking the Android

Proceed to select the “Unlock Android Screen/FRP” option and continue into the “Unlock Android Screen” option.

Step 3: Select Mode and Device Details

If you intend not to lose data, continue to the “Remove without data loss” option. You will have to select the details of the connected Android device.

Step 4: Access Download Mode

Put your Android device in Download Mode by powering it off. Continue to press the “Volume Down,” “Home,” and “Power” buttons simultaneously. After a few seconds, press the “Volume Up” button to enter the Download Mode.

Step 5: Unlock Android Successfully

The package starts downloading as the ZTE Nubia Flip 5G device gets into Download Mode. It will take a while until it completes. Once the download process gets completed, press the “Remove Now” button to remove the Android screen lock.

Image name: lock-screen-wallpaper-on-android-32.jpg

Image link: https://images.wondershare.com/drfone/guide/android-unlock-07.png

Image alt: start removing screen lock

## Conclusion

The details provided are comprehensive in helping you change the lockscreen wallpaper on Android. While learning unique ways, along with dedicated techniques for smartphones, we are sure that you are clear about how to change lock screen picture on Android phone.Why not take a try now? This article has also introduced some of the best sites to download Android wallpapers. For effective results and to save your locked device from getting useless, use Dr.Fone – Screen Unlock.