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.

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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.

Click here

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.

Click here

• 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.

Click here

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!

Forgotten The Voicemail Password Of Vivo Y78t? Try These Fixes

You can always stay in touch with friends, family, and coworkers thanks to voicemail support, which is provided by most cell phones. However, forgetting the voicemail passcode is simple when we must remember many codes to open various devices. Fortunately, there are workarounds you can use to get back into your voicemail mailbox. Keep reading to find out what to do if you forget your voicemail password.

Part 1: 3 Easy Ways To Reset Or Change Your Lost Voicemail Password

1. Contact your carrier

Your carrier can also unlock your voicemail. Get in touch with your carrier and ask for an unlock. For unlocking, your account may need to satisfy certain conditions. The request can take a few days to be processed after you submit it.

Get in touch with your carrier to find out the status of your unlock request.

The actions following should be followed when your carrier certifies that the voicemail has been reset.

• Take your SIM card out.
• Put the new SIM card in. Your gadget will turn on, and you will be able to generate a new voicemail password.

2. Use your code to reset password

To change your Voicemail password, use star codes. Fortunately, this process is quick and easy, and you won’t need to contact customer care to change your password.

Use the star code as follows:

• Type #793# into the dialer app on your phone.
• Press the Call key.
• Await the instructions.

This will change your voicemail password to your phone’s last four digits.

You can also reset your voicemail password, which means that you can generate a new code by resetting it from the settings. Let’s have a look at how you can do this.

• Open My Wireless from your account summary.
• Select the Vivo Y78t device you wish to manage by scrolling to My Devices & Add-ons.
• Choosing Manage my device.
• Look under Device choices & settings, choose Reset voicemail password, then adhere to the on-screen instructions.

3. User carriers’ apps or websites

All of the apps/websites below enable you to reset a voicemail password because they are purely user carrier apps or websites that are recommended officially.

1. Vxt

Their voicemail is visually shown via the app.

Your voicemails will be converted to text by Vxt, which will then provide a preview on your lock screen.

Carrier: US Cellular, AT&T, MetroPCS, T-Mobile, Verizon, Alltel, Cricket

2. YouMail

YouMail is an Android app that helps you to control visual voicemail. Additionally, it provides some great call-blocking features. With the help of this program, unsolicited calls will never longer ever reach you.

Carrier: US Cellular, AT&T, MetroPCS, T-Mobile, Verizon, Alltel.

3. Visual voicemail from AT&T

You can view the caller’s name and phone number before listening to their message, which makes monitoring your voicemail incredibly simple.

Carrier: US Cellular, AT&T, MetroPCS, T-Mobile, Verizon, Alltel, Cricket

Part 2: FAQs

1. How To Know My Default Voicemail Password?

Depending on your carrier, the default voicemail password is either the last seven or final four digits of your phone number. Your voicemails should be accessible if you dial the number without the area code. In this way, you can quickly get your default voicemail password.

2. Can I Remove My Voicemail Password?

From your mobile device, dial 123 to see the password for your voicemail. To enable (add) or disable (delete) your voicemail password, choose option 4. To enable or disable the screen password, select option 1. If your password has been deactivated, dialing 123 will not ask you to enter one.

3. How Can I Receive Voicemail Messages From Another Device?

You may access your mailbox on another phone if your phone is out of reach or the battery is dead. Make a call to your phone number from a different one. Tap the pound key (#) on the phone’s dial pad after the prerecorded “Please leave a message” greeting has begun to play. Enter the pin from your voicemail to start receiving messages from another device.

Bonus Tip: Best Tool When You Forgot The Phone Password

Dr.Fone - Screen Unlock (Android)

The Best Tool to Remove the Phone Screen!

• Completely unlinked from the previous Google account, it won’t be traced or blocked by it anymore.
• Remove all Android screen locks (PIN/pattern/fingerprints/face ID) in minutes.
• Almost all Samsung phones and tablets are supported (Currently for Android 6-14).
• Provide specific removal solutions to promise good success rate.

4,008,670 people have downloaded it

Dr.Fone - Screen Unlock (Android) is the ultimate solution when you are sort of a person who always forgets passwords and does not even have any technical knowledge. We always recommend you use easy and safe tools; Dr.Fone - Screen Unlock (Android) is one of them. Here’s how you can use this tool when you forget the phone password and want to recover it on your own.

Step 1: Connect your phone

Installing Dr.Fone on your computer is the first step. From the list of available tools, select “Screen Unlock” from the drop-down menu.

When connecting your locked phone to the PC you wish to save the wallpapers after unlocking it, you should think about utilizing a USB cord. You must select the “Unlock Android Screen” option on the program.

Step 2. Select Unlock Android Screen

In this interface of Dr.Fone, please select “Unlock Android Screen” to keep your unlock process, or your phone cannot be unlocked as you wish.

Step 3. Select device model

Besides a part of Samsung and LG models, “100% Remove Screen Lock” includes most Android phone brands. Please choose your phone brand, and don’t make it wrong!

Here is the brand list; you can check it and find your phone brand.

Step 4. Enter into Recovery Mode

Then follow the instructions on the program to get the Android phone into Recovery Mode. Here we take 3 different models of Samsung phones as examples.

Note: Different brands have different steps to enter the Recovery Mode.

Go to the Recovery Mode on Samsung phone with Bixby

Go to the Recovery Mode on Samsung phone without Bixby

Go to Recovery Mode on Samsung phone with Home Button

Step 5. Instructions to Wipe Cache Partition

Good! You’re now in the final step, be careful to choose the correct options so that the whole process will be perfectly over.

Now no pattern or password is on your phone screen to bother you!

This is how you can easily get rid of phone lock issues.

The Bottom Line

The voicemail function on your mobile device is a crucial tool for improving your interpersonal relationships. You must always have access to it because of this. You may use your iPhone or Samsung smartphone to receive a temporary code even if you forget your password. Alternatively, you can follow instructions for resetting your passcode on the carrier’s app or website.

Have you ever experienced voicemail lockout? Which technique did you employ to fix the issue? Did you know how to reset voicemail password on Android? Comment below with your thoughts and let us know.

How to Unlock Vivo Y78t Pattern Lock if Forgotten? 6 Ways

“How to unlock pattern lock on my Android phone? I have changed my pattern lock and can’t seem to remember it now!”

Lately, we have got lots of feedback and queries like this from our readers who like to perform a pattern unlock on their devices. It doesn’t matter if you have forgotten the password/pattern of your Android device or would like to access someone else’s phone, there are plenty of ways to know how to unlock the pattern on an Android phone. In this comprehensive guide, we will let you know about 6 different ways to perform pattern unlock without any trouble.

Part 1: How to Unlock Android Phone Pattern Lock with Dr.Fone - Screen Unlock (Android)?

If you want to unlock the pin, pattern, password, fingerprint, or any other kind of lock on an Android device, then simply take the assistance of Dr.Fone - Screen Unlock (Android) . It is a highly useful and advanced application that can let you move past the lock screen on your Android phone without losing data (if your phone model is not Samsung or LG devices in this list , it will erase the data after unlocking the screen).

Dr.Fone - Screen Unlock (Android)

Remove Pattern Locks on Android Screen at Ease

• Remove 4 screen lock types - pattern, PIN, password & fingerprints.
• Bypass Android FRP lock without a PIN or Google account.
• Unlock mainstream Android brands like Samsung, Huawei, LG, Xiaomi, etc.
• No tech knowledge is needed. Everybody can handle it.

4,008,669 people have downloaded it

To learn how to unlock pattern lock using Dr.Fone, follow these steps

• Step 1. Install Dr.Fone and launch it to perform pattern unlock. From the home screen, select the “Screen Unlock” option.

• Step 2. Connect your device to the system. Once it is detected, click on the “Unlock Android Screen” button.

• Step 3. Select your device brand to unlock and access reboot instructions, then follow them to complete the process.

• Step 4. You will be notified when the process is completed. Simply disconnect your Vivo Y78t and access it without any pattern lock.

Part 2: How to Unlock Pattern Lock with Android Device Manager?

Besides Dr.Fone, there are also a few more options to learn how to unlock pattern locks on an Android device. Though, these options are not as secure or fast as Dr. Fone’s. For instance, you can take the assistance of Android Device Manager (also known as Find My Device) to do the same. It can be used to remotely ring a device, change its lock, locate it, or erase its content. To learn how to unlock pattern lock on Android, follow these steps:

• Step 1. Go to Android Device Manager (Find My Device) website https://www.google.com/android/find and log in using your credentials.
• Step 2. A list of all the connected devices to your Google account will be provided.
• Step 3. As you would select your device, you will get various options: erase, lock, and ring.

• Step 4. Click on the “Lock” option to change the lock pattern on your device.
• Step 5. Provide the new password for your device and write an optional recovery message.

• Step 6. Apply these changes and exit the window to change the lock on your device.

Part 3: How to Unlock Android Pattern Lock Using the ‘Forgot Pattern’ Feature?

If your device is running on Android 4.4 or older versions, then you can also take the assistance of the “Forgot Pattern” option to perform the pattern unlock. You won’t need a third-party tool or any other device to perform the desired operation. To learn how to unlock pattern lock on your device, follow these steps:

• Step 1. Simply provide any incorrect pattern on your device to get the following screen.
• Step 2. From the bottom of the screen, you can tap on the “Forgot Pattern” feature.

• Step 3. Select the option to unlock your device with your Google credentials.

• Step 4. Provide the correct Google credentials of the account that is linked to your device.
• Step 5. Later, you can set a new pattern for your device and confirm it. This will let you access your Android device with the new pattern lock.

Part 4: How to Unlock Samsung Phone Pattern Lock Using Samsung Find My Mobile?

Just like Android, Samsung has also developed a dedicated feature for finding a device remotely and performing various other operations on it. The Samsung Find My Mobile service can be used to locate your device, change its lock, wipe its data, and perform a few other tasks as well. Needless to say, the service only works for Samsung Android devices. You can learn how to unlock patterns with this tool by following these instructions:

• Step 1. Go to Samsung’s Find my Mobile official website https://findmymobile.samsung.com/ and log in using your Samsung account credentials.

• Step 2. You can select your device from the left panel. By default, it will provide its location on the map.

• Step 3. Additionally, you can access various other services from here as well. Click on the “Unlock My Device” option to proceed.

• Step 4. Now, all you need to do is click on the “Unlock” button to perform pattern unlock on your device.
• Step 5. After unlocking your Samsung device, you will be informed of an on-screen message.

Part 5: How to Unlock Android Pattern Lock in Safe Mode?

This is a simple and effective solution to knowing how to unlock patterns on an Android device. Nevertheless, this solution will only work for third-party lock screen apps. If you are using your phone’s native lock feature, then it might not work. After restarting your phone in Safe Mode, you can easily move past its pattern lock without any trouble. All you need to do is follow these steps:

• Step 1. Simply press the Power button on your device to get the Power menu on its screen.
• Step 2. Now, tap and hold the “Power off” option.

Click here

• Step 3. This will display the following pop-up message. Agree to it and restart your phone in Safe Mode.
• Step 4. Once the Vivo Y78t device would be restarted in Safe Mode, the third-party lock screen would be disabled automatically.

Click here

• Step 5. Later, you can go to the Vivo Y78t device’s Settings > Apps and remove the third-party app as well. In this way, you would be able to learn how to unlock pattern lock for any other app.

Part 6: How to Unlock Pattern Lock with the Factory Reset?

Consider this as your last resort, as it will wipe the data and saved settings on your device entirely. As the name suggests, your device would be restored to its factory setting by losing its data. Though, if you wish to learn how to unlock a pattern by performing a factory reset, then you can perform these steps:

• Step 1. To start with, enter the Recovery Mode on your device. This can be done by pressing the Home, Power, and Volume Up key at the same time.
• Step 2. Though, the correct key combination might differ from one version of the Android device to another.
• Step 3. Use the Volume Up and Down key to navigate and the Power/Home button to make a choice.

• Step 4. Select the wipe data/factory reset option to perform pattern unlock.
• Step 5. Confirm your choice to factory reset your device.

• Step 6. Wait for a while as your phone will perform the needed operations.
• Step 7. Later, you can choose to reboot your phone and access it without any lock screen.

Conclusion

By following this guide, you would certainly be able to learn how to unlock the pattern lock on your device without much trouble. We recommend using Dr.Fone - Screen Unlock (Android) to perform pattern unlock with no data loss. It has a user-friendly interface and is sure to yield the desired results. Now when you know how to unlock patterns on an Android device, you can share this information with others as well to help them!

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