How To Fix OEM Unlock Missing on Vivo Y78t?

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 Y78t 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 Y78t 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 Remove Forgotten PIN Of Your Vivo Y78t

Users of Android phones can benefit from data and file protection tools like passwords, patterns, and PINs. But there are also some significant hazards. For instance, your children may have repeatedly used the wrong password to access your Android phone, or you may have forgotten PIN on your device, pattern, or PIN.

We can use various valuable techniques to remove the Android phone password. According to you, the most typical or initial option must be factory reset. However, if you try to use the factory reset, you will lose all the data on your Android phone.

Read the information below, but first, let’s talk about Android phone passwords and how they operate before moving on to the ways.

The Importance of the Android Lock System

In general, phone passwords are used to secure your device against unauthorized access and shield your files and data from it. You can try using a pattern, password, PIN, or another method to unlock your device. Although it has many benefits, there are also hazards. Risk in the sense that if you lose your device’s password or pattern, you will be unable to access it and will be stuck somewhere.

Several firms are making Android phones, so why shouldn’t more? Because Android phones are in high demand, numerous new businesses are now producing them. We can see that more people than any other operating system use mobile devices with Android. With an Android phone, we can do many functions, be constantly connected to the outside world, and everything runs smoothly.

This is an important issue that needs to be resolved right away. Therefore, some methods can assist you in getting out of it, one of which is doing a factory reset. They believe this is the most effective and secure way; thus, many try it. What about the information you have on the Vivo Y78t device, though? What should you do next because a factory reset will destroy your data?

Methods to Recover Forgotten Password or PIN

1. Google Smart Lock

If you have added a trusted area or device in Google Smart Lock, you can go to that trusted area and reset your password. Alternatively, you can also use trusted devices to unlock your device.

2. Google Find My Device

As you are likely aware, every Android device is connected to a Google account. As a result, if you’d like, you may also use it to unlock Android. You’ll need to know your Google account login information for this. When you’re ready, use these instructions to find out how to unlock a phone password.

Login using your Google credentials by going to the official Google Find My Device website.
You will see the gadgets connected to your Google account as you enter the interface and a map of where they are.
To wipe the Vivo Y78t device, click the ERASE DEVICE option on the left side panel. You will then be required for your password.
Once more, select “Erase.” This will reset the Vivo Y78t device and get rid of the forgot pattern lock.

3. Recovery Mode

Users of Android smartphones and tablets can troubleshoot various issues with their devices using a feature known as Android Recovery Mode. If you discover that your device is functioning strangely, it might be helpful. Recovery Mode Android technically refers to a unique bootable partition with a recovery application installed inside it.

However, users can also use it to reset the android password if it is forgotten. The instructions for resetting android devices through recovery mode differ for every android device.

4. Dr.Fone - Screen Unlock

On most Android handsets, it is wise to give it a try on Dr.Fone to unlock the screen lock easily. It allows you to remove the password, PIN, pattern, and fingerprint from an Android phone.

Step 1. Select Unlock Android Screen

Please select “Unlock Android Screen” to ensure you have the correct unlock process.

Step 2. Select device model

If you see this page, please choose the option fitting your phone, otherwise, you can’t unlock your device as you wish.

(Enter Recovery Mode via the Samsung phone with Bixby)

(Enter Recovery Mode via the Samsung phone without Bixby)

(Enter Recovery Mode via the Samsung phone with the Home button)

Step 3. Instructions to Wipe Cache Partition

On the page Recovery Mode, it’s the most important step to unlock your device. Please click the right buttons.

Congratulations! Now you can access your phone again, and there’re no obstacles when you do anything on your phone.

FAQs

Will Dr.Fone - Screen Unlock Do Harm To My Vivo Y78t?

Answer: No, Dr.Fone is safe for your device, all hardware will be safe, and you can still use your phone as usual when you try our products, but for devices other than Samsung and LG, you may have to face data loss. So, if you want to keep your data safe, please have a backup on your phone.

How To Keep My Data Safe?

Answer: Dr.Fone - Phone Backup is a good option for backing up the sensitive data on your device. If you want to know more, don’t hesitate and find any required information on our website.

Conclusion

Any methods mentioned above can work to overcome the obstacle of unlocking the screen with your Android handset. The best thing about all methods we said is that you just need some easy ways to complete the tasks.

How to Reset a Vivo Y78t Phone that is Locked?

We all have been there when put a tough to crack the lock on the smartphone and forget the password all along. Such circumstances can be tedious at times, but there is a way around it. If you have spent countless hours on how to reset a Vivo Y78t phone that is locked, or how to get into a locked Vivo Y78t phone quickly with or without Factory Reset. This is the right article for you. Here we will describe all the different ways in which you can reset your phone with the convenience of software to even reset it manually. So, without making further due, let’s jump right into it.

Part 1: What should I be aware of before resetting a Vivo Y78t Phone that is locked?

Before you go to reset your locked Vivo Y78t phone, it’s crucial to learn about a few key factors. These factors will enable you to make a well-informed choice and help avoid potential complications during the factory reset process.

1. Data Loss

Resetting your locked Vivo Y78t phone typically involves performing a factory reset. The process erases all data and settings on the Vivo Y78t device. This includes your files, apps, contacts, and other information stored on the phone. You can easily restore these data if you have backed up data before. It’s crucial to back up essential data regularly to avoid data loss.

2. Factory Reset Protection (FRP)

Vivo Y78t , like many other Android manufacturers, implements Factory Reset Protection. It acts as a preemptive safeguard against unauthorized access to a device after a reset. If your phone is linked to a Google account, you will need to input the accurate login credentials after a reset.

Failing to do so may lead to your device being locked. Understanding how to bypass or recover from FRP lock is essential if you find yourself in this situation.

Part 2: How to Reset a Vivo Y78t Phone That is Locked With Google Find My Device?

Resetting a locked Vivo Y78t phone through Google Find My Device presents a convenient solution. It, however, needs you to have activated this functionality on your device. To initiate the reset, please adhere to the following steps:

Step 1: Open a web browser on any computer or alternative device and navigate to the Google Find My Device website. Sign in with the same Google account associated with your locked Vivo Y78t phone.

Step 2: Upon successful login, a list of devices linked to your Google account will be displayed. Locate your locked Vivo Y78t phone from the list and select it. Select the “Erase Device” option from the left-hand panel, and it will trigger a remote factory reset for your locked phone.

Step 3: A confirmation dialog will appear, prompting you to input your Google account password. Finally, click the “Erase” button to initiate the factory reset process.

Part 3: How to reset a Vivo Y78t phone that is locked without a password?

In order to reset your Vivo Y78t phone without a password, you need to have a single software known as Dr.Fone - Screen Unlock (Android) . It’s a powerful and versatile software tool designed to help you unlock your devices under various circumstances. Whether you’ve forgotten your device’s password, PIN, pattern, or fingerprint, or you’re dealing with a locked device due to a broken screen, Dr.Fone - Screen Unlock (Android) can assist you. In order to reset phone correctly, go through the steps given below:

Before resetting your Vivo Y78t phone that is locked, you can install the Dr.Fone application on your Windows PC or Mac first.

Dr.Fone - Screen Unlock (Android)

The Best Unlock Tool to Reset a Vivo Y78t Phone That Is Locked Without a Password!

Remove all Android screen locks (PIN/pattern/fingerprints/face ID) in minutes.
Work for forgotten passwords, second-hand Vivo Y78t devices, etc.
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

Step 1: Launch the Program

First of all, launch the Dr.Fone Screen Unlock on your computer, and you will be greeted with a welcome screen like this. Now, head over to the “Screen Unlock” section.

Step 2: Connect Device

Now, you need to connect your Vivo Y78t phone to the computer via a USB cable and select “Android” > “Unlock Android Screen.” This particular step is an application for all the Android phones out there.

Step 3: Choose Device Model

Here you need to select the exact brand of your phone. In your case, you can just tap “Vivo Y78t .” The program then will start the process for the lock screen removal.

Step 4: Unlock Screen

Go along with the instructions on the screen and remove all the settings of the Vivo Y78t device. Within a short while, the screen will be unlocked.

After the entire process is completed, you can easily access your Vivo Y78t Phone without the need to enter your password. All the restrictions that were set properly to unlock will be removed so that you can use your phone as intended.

Part 4: How to reset a Vivo Y78t phone that is locked with a hard reset

Disclaimer: Only perform this step if you are well accustomed to the Android recovery system or at least know your way around your Vivo Y78t phone.

That being said, you should only resort to using a hard reset if you don’t have any important data on your phone. Further including, resetting your phone with the hard reset option will wipe out any data that’s been stored in it. Now, proceed forward will all the steps are given below:

Step 1: Charge Device

Charge your Vivo Y78t Phone so that it has a batter of at least 30% or higher. Then turn off the phone.

Step 2: Press keys

Now, you need to press the Volume Down + Power button simultaneously until the Vivo Y78t device logo shows up on the screen.

Step 3: Enter Recovery Mode

Now, press the Volume Down button to navigate to the Recovery Mode.

Step 4: Factory Reset

Use the buttons to navigate to the “Wipe data/factory reset” option and select it by pressing the Power button. Now, choose the option ”Factory data Reset” and wait for a few seconds till it is completed.

Step 5: Reboot Now

Again use the Volume buttons and select the “Reboot system now.”

After you have successfully reset your Vivo Y78t phone, it would take a few minutes to boot up. Once that is done, you are left with a clean slate, just like a completely new smartphone.

Part 5: Unlock locked Vivo Y78t phone with Gmail ID and password

It is imperative to understand that unlocking your Vivo Y78t Phone using a Gmail ID and password should be your last resort and especially if you are using an older version of Android. Among all the tricks of how to reset a Vivo Y78t phone that is locked, it only works if you are running around version 4.4 KitKat or older than that. Neither less to say, in order for the step to work properly, you need your Gmail account to be properly configured with the Vivo Y78t device.

Step 1: Attempt Passwords

At first, you need to make five attempts to unlock your device. Whether you have used a PIN or Pattern lock, Android will always give you five attempts to get the password right. Once you get that, it will trigger the “Forget Password/Pattern” option on Your Vivo Y78t. This way, you can sneak back into the system once again.

Step 2: Enter Credentials

Once you hit the option, you will be redirected to another page, where you need to enter your Gmail id and password. Make sure that you get the information right, and select “Sign in.”

Once you get everything right, this will bypass any password or pattern you once had put on your Phone. Just remember, you need to have a stable internet connection in order for the step to work seamlessly.

Bonus Tip: Are There Preventive Measures To Avoid Future Lockouts?

Want to prevent future lockouts and ensure a smoother smartphone experience? Consider implementing the following preventive measures:

1. Setting Up Alternative Lock Methods

One way to avoid getting locked out of your Vivo Y78t phone is to set up alternative lock methods. In addition to PINs, passwords, and patterns, you can use biometric methods. These include fingerprint recognition or facial recognition if your device supports them. Such options provide convenient and secure ways to unlock your phone.

2. Regularly Backing Up Your Data

Regular data backups are crucial to safeguarding your essential files and information. Utilize cloud backup services or local backup solutions to routinely save your data. In case of a lockout or a factory reset, you can quickly restore your data without loss.

3. Using Secure and Memorable Passwords

When setting up lock methods, opt for strong, unique, and memorable passwords. Avoid using easily guessable information like birthdays or simple patterns. Strong passwords can enhance security while minimizing the chances of forgetting your credentials.

Conclusion

There is no point in arguing that looking through how to reset a Vivo Y78t phone that is locked after you have forgotten the password is indeed a hectic process. But, there is a way around it too. By going through all the steps mentioned above, you can always get an unlocked phone with ease.

To our recommendation, we would suggest going through Dr.Fone - Screen Unlock (Android) so that you can make the entire process as seamless as possible. It is by far the easiest and most convenient process to work around. Neither less to say, there are a ton of video tutorials that can assist you in case you get stuck in the middle of the process.

Android Unlock

How To Fix OEM Unlock Missing on Vivo Y78t?