How To Fix OEM Unlock Missing on Vivo X Flip?

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 Vivo X Flip 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 Vivo X Flip 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.

Click here

## 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!

Mastering Lock Screen Settings: How to Enable and Disable on Vivo X Flip

In the modern world, the use of smartphones has become such a common trend that everyone would feel abnormal if they don’t have a smartphone of their own. So big the demand is that all IT companies are trying their best to introduce as well as innovate several excellent brands of smartphones. To support the function of smartphones, by far there have been numerous operating systems existed. Among them, Android is one of the most popular as well as trustworthy OS.

Just like any other smartphone, all Android devices have their ways to protect the data stored inside a smartphone from being corrupted or leaked. One of the simplest and most easy-to-use ways is to make use of the lock screen.

The lock screen has proved to be a traditional yet efficient way to help you protect your Android phones. In this article, we will provide you with an informative piece of writing about everything you need to know when it comes to the Android lock screen, and ways to enable and disable it.

If you have spent time searching and looking for features of your Android devices, you will find the process of enabling a lock screen is a piece of cake.

· Step 1: On the main screen of your Android devices, tap on the gear icon - which is the icon representing the Settings menu. Once you have chosen it, you will see a drop-down menu on the screen. In the options provided, tap on the Security bar.

· Step 2: Under the tab whose heading is entitled Screen Security, tap on the first bar in the list called Screen lock.

· Step 3: Once the step is done successfully, Android will give you plenty of choices about ways to lock your Android devices’ screens. Among these ways, select one particular type which you feel is most convenient as well as free-risk. After that, type in your PIN code to confirm the choice and finally activate your lock screen feature as you wish.

Part 2: How to Disable Android Lock Screen

To certain customers, the lock screen can do more harm than good, and they would prefer to disable the screen lock on their Android devices. This process is also an easy one to follow, as long as you still hold good memory of the security code.

· Step 1: On the main screen of your Android devices, tap on the gear icon. It will directly lead you to the Settings menu of the phone. After that, a drop-down menu will appear with several choices and bars. Among them, tap on the Security option to begin your work.

· Step 2: Under the heading called Screen Security heading, you will be shown 3 choices. Tap on the first one, which is entitled Screen lock.

· Step 3: Once you have done the previous step, a brand new screen will appear and then you will be asked to fill in your PIN code. This is a step that helps guarantee that you are the true owner of the Android device.

Step 4: As soon as you have confirmed the right PIN code in the bar provided, you will then be presented to the next drop-down menu. A similar screen will appear which shows you plenty of choices. Tap on the top of that list, which is a bar called None.

Step 5: In the end, you have successfully disabled the screen lock on your Android devices. You are now capable of using it without any hesitation about the screen lock.

Part 3: Common Problems of Disabling Lock Screen

The process to disable the screen lock on Android may seem easy to handle as well as straightforward to several customers, but there are still some annoying problems that users have to deal with while trying to disable the lock screen.

What are the top 2 common problems?

Below are the two most common problems faced by Android users during their efforts to disable the feature of screen lock.

1. In the Screen Security choice, the None bar can not be chosen.

Description of the problem: There is a sentence below it stated: “Disabled by administrators, encryption policy or credential storage”. All the space of the None option is in white and grey.

The solution to this problem is quite simple. Once you have made sure you are suffering from this nasty one, try to follow these below pieces of advice to see if it is capable of giving you a hand.

Step 1: Open the Settings menu from the main screen. Then tap on the Credential Storage. You will see a drop-down menu like the screenshot below.

Step 2: Continue to tap on the Clear Credentials (Remove all certificates) option. Then next click on the OK button. Wait for some seconds until your Android device has finished the process.

Step 3: To make sure that the previous step has been performed successfully, try looking at the bottom of the drop-down menu. If the Clear Credentials (Remove all certificates) are grey out and can not be selected, then you have managed to do it.

Step 4: Now that the problem is solved, you can feel free to turn back to your Screen lock option in the beginning and disable the feature of locking screen Android as usual.

2. You have mistakenly encrypted your SD card. You want to disable the encryption, only to realize that it requires you to set a new screen lock code. But when you come to the Screen lock menu, all the options but Password have been greyed out.

This is pretty weird, but actually, it is one of the most common troubles that many users have complained about. But to your surprise, the solution is very simple and easy. All you have to do is to reset your password, but with a little change. Your password MUST include at least ONE NUMBER in it. Confirm your new password then you will be able to disable the lock screen Android as usual.

Bonus Tip: Remove Android Screen Lock If Forgotten Password/Pattern

As much as the lock screen can protect the personal information on the phone, it can also cause much trouble if you forget the lock screen password or enter the wrong password too many times. So here comes the need for phone unlocking software . One of the best is Dr.Fone - Screen Unlock (Android), which can help us bypass forgotten Android screen locks without any data loss（limited to Samsung and LG series phones）. Other Android brand phones will be wiped out all the data once starting to unlock with Dr.Fone

Dr.Fone - Screen Unlock (Android)

Remove 4 Types of Android Screen Lock without Data Loss

• It can remove 4 screen lock types - pattern, PIN, password & fingerprints.
• One-time payment for unlimited use of multiple devices within a specified time period.
• Work for Samsung Galaxy S/Note/Tab series, LG G2/G3/G4, etc.
• Besides, unlocking the screen lock, it also works best to unlock the Samsung FRP lock in devices with Android 5.0 and higher.

3981454 people have downloaded it

Steps on How to Unlock Forgotten Password in Android Phones

Step 1: Launch Dr.Fone and click on Screen Unlock from the primary window.

Step 2: Connect your Android device to the computer via USB cable. The program will recognize the phone directly. Select the phone model or “I can’t find my device model from the list above” to continue.

Step 3: Follow the instruction on the program exactly to set the phone to Download Mode. First, you will need to Power off your Phone. Secondly, Press on Volume Down, Home button, and Power button simultaneously. Thirdly press the Volume up button to navigate until the phone enters Download mode.

Step 4: After you set the phone to Download mode, it will begin to download the recovery package. When the recovery package is downloaded successfully, the lock screen on your Vivo X Flip devicewill be removed. You won’t lose any data during the whole process.

6 Solutions to Unlock Vivo Phones If You Forgot Password, PIN, Pattern

Too many times, we forget the passcode of our smartphones, only to regret it later. Don’t worry if you are facing the same issue. It happens to all of us at times. Fortunately, there are many ways to unlock an Android device even when you have forgotten its password/pin/pattern lock. This guide will teach you how to unlock Vivo phones if you forgot the password in five different ways. Read on and choose your preferred option if you forgot the password on your Vivo phone and move past every setback you face.

Solution 1: Unlock Vivo Phone using Dr.Fone - Screen Unlock (5 mins solution)

Among all the solutions we are going to introduce in this article, this is the easiest one. Dr.Fone - Screen Unlock (Android) can help you remove the lock screen of some Vivo and Samsung devices without any data loss. After the lock screen is removed, the phone will work like it’s never been locked before, and all your data are there. Besides, you can use this tool to bypass the passcode on other Android phones, such as Huawei, Lenovo, Oneplus, etc. The only defect of Dr.Fone is that it will erase all the data beyond Samsung and Vivo after unlocking.

Dr.Fone - Screen Unlock (Android)

Get into the Locked Vivo Phone within Minutes

• Available for most Vivo series, like LG/LG2/LG3/G4, etc.
• Except for Vivo phones, it unlocks 20,000+ models of Android phones & tablets.
• Everybody can handle it without any technical background.
• Offer customized removal solutions to promise good success rate.

4,008,669 people have downloaded it

How to unlock an Vivo phone with Dr.Fone - Screen Unlock (Android)?

Step 1. Launch Dr.Fone.

Download Dr.Fone from the download buttons above. Install and launch it on your computer. Then select the “Screen Unlock“ function.

Step 2. Connect your phone.

Connect your Vivo phone to the computer using a USB cable. Click on Unlock Android Screen on Dr.Fone.

Step 3. Select the phone model.

Currently, Dr.Fone supports removing lock screens on some Vivo and Samsung devices without data loss. Select the correct phone model information from the dropdown list.

Step 4. Boot the phone in download mode.

• Disconnect your Vivo phone and power it off.
• Press the Power Up button. While you are holding the Power Up button, plug in the USB cable.
• Keep pressing the Power Up button until the Download Mode appears.


Step 5. Remove the lock screen.

After your phone boot in download mode, click on Remove to start to remove the lock screen. This process only takes a few minutes. Then your phone will restart in normal mode without any lock screen.

For more detailed steps, please go to our guide on unlocking Android phones with/without data loss .

Solution 2: Unlock the Vivo Phone Using Android Device Manager (Need a Google account)

This is probably the most convenient solution to set up a new lock for your Vivo device. With Android Device Manager, you can locate your device, ring it, erase its data, and even change its lock remotely. All you got to do is log in to the Vivo X Flip device Manager account using the credentials of your Google Account. Needless to say, your Vivo phone should be linked to your Google Account. Learn how to unlock the Vivo phone if forgot your password using Android Device Manager.

• Step 1. Start by logging in to Android Device Manager by entering the credentials of your respective Google Account that is configured with your phone.

• Step 2. Select your device’s icon to get access to various features like ring, lock, erase, and more. Out of all the provided options, click on “lock” to change the security lock of your device.

• Step 3. Now, a new pop-up window will open. Here, provide the new password for your device, confirm it, and click on the “lock” button again to save these changes.

That’s it! Your phone will reset its password, and you would be able to move past any problem related to forgetting the password on the Vivo phone using Android Device Manager unlock .

Solution 3: Unlock the Vivo Phone Using Google Login (only Android 4.4 and below)

If your Vivo device runs on Android 4.4 and previous versions, then you can easily move past the password/pattern lock without any trouble. The provision is not available on devices, which run on newer versions of Android. Nevertheless, for all the Vivo X Flip devices running on older versions than Android 4.4, this is undoubtedly the easiest way to set a new passcode. Follow these steps to learn how to unlock your Vivo phone if you forgot your password using your Google credentials.

• Step 1. Try bypassing the pattern lock at least 5 times. After all the failed attempts, you will get the option to either make an emergency call or choose the option of “Forget pattern”.

• Step 2. Select the “Forget pattern” option and provide the correct credentials of your Google account to unlock your phone.

Solution 4: Unlock the Vivo Phone Using Custom Recovery (SD card needed)

If your phone has a removable SD card, you can also try this technique to disable the pattern/password on your device. Though, you need to have some custom recovery installed on your device for this method. You can always go for TWRP (Team Win Recovery Project) and flash it on your device.

TWRP: https://twrp.me/

Also, since you can’t move anything to your device when it is locked, you need to do the same using its SD card. After ensuring that you have met all the basic prerequisites, follow these steps and learn how to unlock the Vivo phone’s forgotten password using a custom recovery.

• Step 1. Download a Pattern Password Disable application and save its ZIP file on your computer. Now, insert your SD card into your system and move the recently downloaded file to it.

• Step 2. Reboot your phone into recovery mode. For instance, the TWRP recovery mode can be turned on by simultaneously pressing the Power, Home, and Volume Up button. You would get different options on your screen after entering the custom recovery mode. Tap on “Install” and browse the Pattern Password Disable application file.

• Step 3. Install the above-mentioned application and wait for a few minutes. Afterward, restart your Vivo phone. Ideally, your phone will be restarted without any lock screen. If you get a lock screen, you can bypass it by entering any random digits.

Solution 5: Factory Reset Vivo Phone in Recovery Mode (erases all phone data)

If none of the above-mentioned alternatives work, then you can also try to factory reset your device. This will erase every kind of data from your device and make it look brand new by resetting it. Though, you can easily resolve the forgot password on the Vivo phone with it. Therefore, before proceeding, you need to be familiar with all the repercussions of performing a factory reset. All you got to do is follow these steps.

• Step 1. Put your Vivo phone on its recovery mode with correct key combinations. To do this, firstly, turn your device off and let it rest for a few seconds. Now, press the Power and Volume Down key at the same time. Keep pressing them until you see LG’s logo on the screen. Release the buttons for a few seconds and press them again at the same time. Again, keep pressing the buttons until you see the recovery mode menu. This technique works with most Vivo devices, but it can differ slightly from one model to another.

• Step 2. Choose “Wipe Data/Factory Reset.” You can use the Volume up and down key to navigate the options and the power/home key to select anything. Use these keys and select the “Wipe Data/Factory Reset” option. You might get another pop-up asking to delete all user data. Just agree it reset your device. Sit back and relax as your device will perform a hard reset.

• Step 3. Select the “Reboot system now” option to restart it. Your phone will be restarted without any lock screen.

After following these steps, you can easily overcome how to unlock the Vivo phone forgot password issue.

Solution 6: Unlock Vivo Phone Using ADB Command (need USB debugging enabled)

This might be a little complicated initially, but if you don’t want to follow either of the above-mentioned techniques to unlock your device, you can go with this alternative. Before proceeding, make sure that you have ADB (Android Debug Bridge) installed on your computer. If you don’t have it, then you can download Android SDK right here .

Additionally, it would help if you turned on the USB Debugging feature on your phone before you forgot the password. If USB debugging is not turned on before, then this method will not work for you.

After making your device ready and downloading all the essential software on your computer, follow these steps to learn how to unlock your Vivo phone if you forgot the password.

• Step 1. Connect your device to the computer with a USB cable and open the command prompt when it is successfully connected. If you get a pop-up message regarding USB Debugging permission on your device, simply agree to it and continue.

• Step 2. Now, please provide the following code on the command prompt and reboot your device when it is processed. If you want, you can also tweak the code a little and provide a new lock pin.

• ADB shell

• cd /data/data/com.android.providers.settings/databases

• _sqlite3 settings._db

• update system set value=0 where name=’lock_pattern_autolock’;

• update system set value=0 where name=’lockscreen.lockedoutpermanently’;

• .quit

• Step 3. If the above code doesn’t work, try providing the code “ADB _shell rm /data/system/gesture. the key_” to it and follow the same drill.

• Step 4. After restarting your device, if you still get a lock screen, then give a random password to bypass it.

Conclusion

You can choose a preferred option and rectify the issue whenever you forgot the password on the Vivo phone . Make sure that you meet all the requirements and go through the respective tutorial to attain fruitful results.