How To Fix OEM Unlock Missing on Vivo Y100A?

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 Y100A 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 Y100A 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!

How to Unlock Vivo Y100A Phone without PIN

Being locked out of your device just because you forgot your lock screen pin can be so horrible. When this happens, most people tend to think that this is the end of everything. That isn’t true. You can always unlock your android screen no matter how many times you forget your screen lock pin. This article points out how to unlock your android screen lock if it happens that you forgot Android PIN.

Part 1.How to Unlock your Vivo Y100A PIN Using Dr.Fone - Screen Unlock (Android)

If your android lock screen is locked because you have forgotten the pin, you will, of course, think of finding the best android phone unlocking software . Dr.Fone is the best android lock screen removal that you can use. Within five minutes, you can use this android lock screen removal to remove up to four types of android screen lock types which are: PIN, Pattern, Password, and Fingerprints.

With Dr.Fone - Screen Unlock (Android) , you also can unlock your screen without any data loss. Using this lock removal is very easy as it doesn’t require any technical knowledge. Anyone who knows how to use an android device can use it. This app is used to unlock Samsung Galaxy S, Note, Series and much more.

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.
• Only remove the lock screen, no data loss at all.
• No tech knowledge asked, everybody can handle it.
• Work for Samsung Galaxy S/Note/Tab series, and LG G2/G3/G4, etc.

4,669,934 people have downloaded it

How to Use Dr.Fone - Screen Unlock (Android)

Note：You can also use these tool to bypass other phone’s screen including Huawei, Xiaomi,etc., but it will wipe all your data after unlocking.

Step 1: Download and install Dr.Fone, the android lock screen removal on your device. Launch the program and click “Screen Unlock”.

Step 2: On the interface that appears, click “Start”, and then connect your Vivo Y100A deviceto your PC using a USB cable.

Step 3. Select your phone’s model in the list provided. Type “000000” on the blank box provide and then click the “Confirm” button.Then follow the guide provided to enter download Mode. You can also Power off the android device, and then press Power, Home and Volume Down button simultaneously and then press the Volume Up in order to enter download mode.

Step 4. The program will then download recovery package automatically. Be patient until the process is complete. After that you can now remove the lock pin.

Well done! you have now removed the distressing pin on your phone. Next time put a pin that you can easily remember.

Part 2.How To Enable Your Android Screen Lock PIN

The security of your device is one of the most important things that you should consider. Setting up or enabling your android screen lock PIN will ensure the safety of your personal information and data. Enabling a Screen lock PIN on your Vivo Y100A deviceis very simple. You need no technical knowledge in order to do so. It will take you less than a minute to complete the simple process.

So how do you set up your android screen lock PIN? Here is a step-by-step guide on how to set the lock screen PIN on your android device.

Step 1. Open “Settings” on your Phone

On your android device, open Settings. You can find the settings app in the app; drawer. You can also tap the cog icon on the notification mode and click Settings.

Step 2: Select the “Security” tab under “Personal”

Step 3: Once you have clicked on “Security”, Go to “Screen Lock.” You will be provided with lock screen option such as None, Swipe, Pattern. PIN, and Password.

Step 4. Click on “PIN” option. You will be prompted to enter preferred 4-didgit PIN number. You will then be required o key in the same 4 digits to confirm your security PIN. Click “OK” and you will have enabled your Android screen lock PIN.

Good job. You will have to enter this PIN whenever your phone sleeps or when you reboot your phone.

Part 3. How to Disable Your Android Screen Lock PIN

In most occasions, in fact, 99.9%, the first thing that you will see when you power on your device or want to call, receive a call, or want to read a message. The availability of lock screen is to ensure the security and privacy of your personal data such as text, photos, and much more. However, the presence of the lock screen PIN will cause some delay in the actions that you want to take, but not so much. The delay is of course for a few second. The Problem is if you are prone to forgetting the screen lock PIN. This may necessitate the removal of the PIN or disable it in that case. If privacy and security of your device data are not anything that bothers you, then there is no need to waste some of your time in entering the locks screen pin every time you want to access your android device. Disable the Screen lock Pin. The steps are so simple and will not consume more than one minute to do so. Below is a step-by-step guide on how to disable your android screen lock PIN.

Step 1. On your android device, click to open the “Settings” app.

Step 2. In the interface that opens, go to “Security”

Step 3. You can then click on “Screen Lock” and select “None” to disable the screen lock PIN.

You will be prompted to enter the current PIN in order to disable it. Key in the PIN and you will have successfully disabled the Lock screen PIN. When you power off and the power on your android device, you will easily access your phone without any need for security PIN. Similarly, anyone can use your phone if they can gain access to it as it doesn’t have any screen lock.

Enabling screen lock on your Android is the smartest thing to do especially if you value your own privacy. On the other hand, it is a nightmare if you forget screen lock and you don’t know how to go about it. But at this moment, at least you have known a perfect way that you can remove screen lock without losing data on your Android phone.

Unlocking Made Easy: The Best 10 Apps for Unlocking Your Vivo Y100A Device

Android phones are extremely popular, but many feel that the otherwise great operating system does not allow the kind of freedom they want. One of the frequently brought up problems is the lock screen and the unlocking mechanism itself. With a lot of phones, it can be quite sluggish and slow. There are many applications that change the lock screen both from a style and a functionality standpoint, and some of them are quite impressive. A quality Android unlock screen app allows you to customize it while possessing the main characteristics that you are looking for in any good application.

There are a lot of apps like that these days, and choosing between them is not always an easy task. Let’s take a look at the best 10 unlock apps for android.

Dr.Fone - Screen Unlock (Android)

Remove Android lock screen in 5 minutes

• Pattern, PIN, password, fingerprints & face screen lock can all be unlocked.
• Bypass Android FRP lock without a PIN or Google account.
• No tech knowledge asked, everybody can handle it.
• Unlock mainstream Android brands like Samsung, Huawei, LG, Xiaomi, etc.

3,981,454 people have downloaded it

1.Hi Locker

Hi Locker offers a similar style to CyanogeMod’s lock screen both from an aesthetics and functionality standpoint. It has all the looks of the most popular devices including Lollipop and iOS, as well as a second screen containing the calendar and many more goodness. If you are looking for unlock apps for Android, Hi Locker is clearly one of the best choices.

Hi Locker allows password and pattern unlocking.

2.Lok Lok

Lok Lok has a unique take on the locking screen application niche, allowing you to send drawings to people who use the same application. It has the basic functions of course but it really is only fan when others you know, use the same app as well. This fact kind of restricts this otherwise excellent application but the idea is genius. An Android unlock screen app that allows your creative side to shine through.

This Android unlock app doesn’t allow pin lock screen at the moment, it can be unlocked with the home button

3.Next News Lock Screen

When you are looking for unlock apps for android, you don’t necessarily think about reading the news, yet many times you would go to lengths to find them. What if the news you find the most interesting would appear on your lock screen? Would that be something you’d interested be in? If the answer is yes, this Android unlock screen app is for you.

4.CM Locker

A very interesting application with a slide-to-unlock feature that’s eerily similar to iPhone devices. The app allows you to control several main phone functions including but not limited to brightness, WiFi, sound or Bluetooth. One of the most versatile unlock apps for Android.

This android unlock app allows pin and pattern unlock, and it also has an intruder alert (the phone locks and takes a photo when somebody unsuccessfully tries to unlock it).

5.Slidelock Locker

Another app that takes advantage of Apple’s popularity by bringing in the “slide-to-unlock” mechanics and the general aesthetic qualities of the iOS home screen. In addition to possessing the basic functions, this Android unlock screen app also highlights messages.

6.Semper

This Android unlock app was once called UnlockYourBrain and it is quite unique in the way that it will make you work for your phone time. This may sound ridiculous at first, but actually a very clever idea and naturally emergency numbers can be called at all times.

Google Play link: https://play.google.com/store/apps/details?id=co.unlockyourbrain&hl=en

How to unlock : Solve a problem or an equation to unlock the screen.

7.Next Lock Screen

Next Lock Screen is a cross platform unlock app that’s compatible with the complete Android ecosystem, making it one of the most valuable unlock apps for Android on the market. As a Microsoft product, it likes to advertise some of their other applications but this feature can thankfully be turned off. The notifications are clearly Microsoft quality which is not necessarily something that can be said about your average Android unlock screen app.

How to unlock : Pin,swipe or pattern.

8.AcDisplay

AcDisplay comes with a rather minimalistic look similar to some of the most popular web site creator services like Squarespace or Wix. The home screen will highlight notifications for which it will offer two options, either you swipe down in which case you will ignore the notification, or swipe anywhere else and the lock screen will unlock. What’s really great about this Android unlock app is the fact that it can use your device’s sensors, allowing it to detect its placement therefore whether or not it should be on or off.

Google Play link: https://play.google.com/store/apps/details?id=com.achep.acdisplay&hl=en

How to unlock : You can swipe anywhere on the screen.

9.C Locker Pro

It would be unjust to call it an Android unlock app, this application is actually a carefully selected package that allows you to do a lot of cools stuff with your new and improved home screen. Not only it supports the usually methods of unlocking like swipe or patterns, but you can actually set double or even triple tap options which is quite unique and a very good idea. The app has every other usual options including setting your favorite apps or showing the lock, as well as the date and the temperature of course.

Google Play link: https://play.google.com/store/apps/details?id=com.ccs.lockscreen_pro&hl=en

How to unlock : This Android unlock screen app allows you to unlock the screen with swiping, patterns or even specific number of taps.

10. Echo Notificaiton Lockscreen

Another minimalistic design that works quite well, it also allows you to set different notification categories like “work”, “media” or “social”. Not only that, but you can also choose various apps to go with those categories. Messages come through as well of course, all with a “slide to unlock” feature that is so popular these days.

How to unlock : Slide right like you would with an iOS device.

Bonus Tips: Easily bypass Android Lock Screen/Google FRP on Android with Dr.Fone - Screen Unlock (Android) . It effortlessly resolves issues like lost Google accounts, forgotten PIN codes, and unlocking used phones. Supported mainstream Android brands like Samsung, Xiaomi, Vivo, etc.