Hassle-Free Ways to Remove FRP Lock on Vivo V30 Lite 5G Phones with/without a PC

“I just bought a used Vivo device from the mobile market without checking the already signed in Google account, and I don’t even know what Gmail ID is added to this device, so I’m looking for FRP Vivo bypass tools. Please help.” A user says so on Quora.

In all such and similar situations when you have authorized access to your Vivo or any other Android device, but not the right Google credentials, the need for a tool that can bypass the lock arises. The content below will take you through these FRP bypass Vivo tools.

Part 1. Can I Bypass Google Lock on Vivo ?

Yes, the Google Lock on Vivo can be bypassed using an FRP bypass tool. Although in case of theft and loss, the FRP lock is a great feature, but on the flip side, in a situation where you forget your Google credentials, the function can be more of a problem than of use. Additionally, if you have got a hand on a second-hand device having an FRP lock, then also you would be in trouble accessing the phone.

You can choose between tools without a computer as well as PC-based programs to bypass and remove the Google Account. Once the account is removed using the tools, the following will be the benefits.

• You will have complete access to your Vivo device and its features.
• Once the lock is removed, it will completely de-link from the previous Google account and hence cannot be blocked or traced by the previous owner.
• You can permanently delete the Google account.

Part 2. How to Bypass Google Lock on Vivo Without Computer? (30 Min & Free)

To remove the Vivo FRP bypass without using a system, the EMERGENCY CALL method can be used. Though this method is free, it is lengthy and complicated.

Steps for Vivo FRP bypass without computer

• Step 1. Connect your Vivo phone to a Wi-Fi and then switch it on for the HELLO screen to appear. Next, select the Emergency Call option and then click on Emergency Information two times.
• Step 2. On the Emergency Information page, tap on the Pencil icon and Name. Next, click o the profile icon and select the option of changing an image.

• Step 3. Next click on Menu > Photos > Permissions. Click on the Contacts options and select See All apps with this permission.
• Step 4. Click on the Search > Settings> Settings App Info > Open. With this, you will enter the Settings section of the Vivo V30 Lite 5G device, after which select Accessibility > Accessibility Menu and turn in On.
• Step 5. Go back to the settings and choose Apps & Notifications > App Info. The list of the app will appear, and now you will have to disable some apps for the FRP process.
• Step 6. Choose 3 dots > Show System Apps and then click on Android Setup > Force Stop > OK.
• Step 7. Using the Storage & Cache option, wipe off the Storage and the Cache. Click Disable > Disable App.
• Step 8. Next, click on the blue settings icon of Android Setup and click on Force Stop.
• Step 9. From the Android Setup, remove all the storage and the cache data. Next click on Google Play Services > Disable > Disable App.
• Step 10. Now you need to go to the main Hello homepage by clicking on the back arrow multiple times. Select the Start option and the Vivo V30 Lite 5G device screen will start loading.
• Step 11. When the updates are being checked by the screen, go back to the Wi-Fi connection page.
• Step 12. Open the Shortcut Menu by swiping up from the bottom to the top using 2 fingers.
• Step 13. Click Assistant > Settings > Enable Google Play Services. Move back and select Skip > Continue.
• Step 14. Click on More > Accept.
• Step 15. At the Set Screen Lock, click Skip > Skip > OK > Accept & Continue and then go to the home screen.
• Step 16. Finally, to bypass google lock on Vivo without pc, go to Settings > System > Advanced > Reset Option and here choose to Erase All Data options 3 times.

Part 3. How to Bypass Google Lock on Vivo with Computer? (15 Min but Paid)

If you have access to a computer, Motoreaper is a decent Vivo FRP tool for Vivo FRP bypass with computer. Developed by the Phonlab team, Motoreaper is a Windows-based tool that works on the majority of Vivo devices including Moto E, Moto X, Moto G, Droid Turbo, Droid Maxx2, and others.

Steps for Vivo FRP bypass using Motoreaper

• Step 1. Download and install the Motoreaper software on your system and launch the same.

• Step 2. Now you need to get your Vivo phone into bootloader mode and for this, you need to power off your device and then turn it on by pressing and holding the power and volume down buttons together for a few seconds.
• Step 3. Next, connect your phone to your PC using a USB cable and the software will successfully show the connected device.

• Step 4. Next, unplug your Vivo phone and boot it into the factory model using the bootloader mode by pressing the power and volume down button. When the factory mode appears, use the power button to select it.
• Step 5. Now connect your phone again to your system and let it boot up completely. Next, click on the I have Done option.
• Step 6. Now your device is on the factory mode where you need to click on, the I Confirm option.
• Step 7. Next for Vivo Google bypass, use debugging in your device and then tap on I confirm at Moto Rapersoftware.
• Step 8. The Unlock No button will appear in the Moto Reaper software which you have to click after which the Google bypass Vivo process will be complete and the FRP lock will be removed.

Part 4. How to Unlock Vivo Phone Passcode? (5 Min)

Besides FRP lock, the screen lock of your Android phones including Vivo is one of the most common situations. So, if to have forgotten your screen lock code or have a device with a locked screen, the best tool we reconned is Dr.Fone - Screen Unlock (Android) . This simple system-based software will let you remove all types of screen locks – PIN, password, pattern, as well as a fingerprint in a few simple and quick steps. The software is reliable and safe without causing any harm to your device.

Dr.Fone - Screen Unlock (Android)

Get into Locked Vivo within Minutes

• 5 screen lock types are available: pattern, PIN, password, fingerprints & Face ID.
• Easily remove the lock screen; No need to root your device.
• Everybody can handle it without any technical background.
• Provide specific removal solutions to promise good success rate

4,008,671 people have downloaded it

• Step 1. Launch the installed software on your system and from the main page, choose the Screen Unlock option.

• Step 2. Using a USB cable, connect your phone to your system and then select Unlock Android Screen option on the software interface.

• Step 3. From the supported list on the software interface, select Vivo .

• Step 4. Your Vivo phone will enter into a dedicated mode. Once in this mode, Dr.Fone will initiate the Vivo screen unlock process.

• Step 5. When the process is complete, you can access your Vivo device without any need for a password.

Click here


safe & secure

Conclusion

Vivo FRP lock can be removed using the Emergency Call option or the above-mentioned Motoreaper tool. For removing any type of screen lock without password on your Android devices, Dr.Fone – Screen Unlock (Android) works as the best option.

Step-by-Step Tutorial: How To Bypass Vivo V30 Lite 5G FRP

Smartphones are now integral to people’s daily lives. In recent days Vivo V30 Lite 5G has gained immense popularity. It is due to the Vivo V30 Lite 5G device’s impressive features and affordability. The rising cybercrimes have forced manufacturers to increase measures for device security. One such security feature is the Factory Reset Protection (FRP) on the Vivo V30 Lite 5G. It is designed to safeguard the Vivo V30 Lite 5G device from unauthorized access.

While this feature has its advantages, it can pose a significant challenge when users. This is especially the case when they need to perform a factory reset but have forgotten their Google account credentials. In this comprehensive tutorial for 2023, we will guide you step by step on how to bypass the Vivo V30 Lite 5G FRP.

Part 1: Understanding the Vivo V30 Lite 5G FRP

Having a clear understanding of what exactly Vivo V30 Lite 5G FRP entails is important. It will make the process of the Vivo V30 Lite 5G FRP bypass easier and hassle-free. In this section, we will explore the concept of FRP, its purpose, and how it is activated on the Vivo V30 Lite 5G:

What is Vivo V30 Lite 5G FRP?

FRP, or Factory Reset Protection, is a security feature integrated into Android devices. It is also included on the Vivo V30 Lite 5G by Google to prevent unauthorized access to the Vivo V30 Lite 5G device. When FRP is activated on a smartphone, it links the Vivo V30 Lite 5G device to the user’s Google account.

That makes it mandatory to verify the account credentials after performing a hard reset. In other words, FRP acts as a protective barrier. It ensures only the rightful owner can access the Vivo V30 Lite 5G device.

Purpose of Vivo V30 Lite 5G FRP

The primary purpose of Vivo V30 Lite 5G FRP is to safeguard personal data and sensitive information stored on the Vivo V30 Lite 5G device. It works as an important security measure in the unfortunate event of the Vivo V30 Lite 5G device being lost or stolen. FRP ensures that no unauthorized individual can gain access to the Vivo V30 Lite 5G device’s contents. It does that by requiring the original owner’s Google account login details.

By requiring the user’s Google account credentials, FRP reduces the chances of device misuse. Thus, it ultimately enhances the data security and privacy of your device.

Activation Methods of Vivo V30 Lite 5G FRP

When you register a Google account on your device, the FRP gets activated automatically. If you remove the Google account from the Vivo V30 Lite 5G device before performing a factory data reset, the FRP will be disabled. However, once the FRP is enabled, it will stop you from using your Vivo V30 Lite 5G after a factory data reset in an untrusted environment.

In simple words, any other way to factory reset the Vivo V30 Lite 5G device except factory reset through settings will trigger FRP lock. A command example of this is a hard factory reset which usually enables FRP lock after the process.

Part 2: Preparations Before Bypassing Vivo V30 Lite 5G FRP

Now that you have a comprehensive understanding of the Vivo Y12 FRP bypass, it’s time to prepare for the bypassing process. This section will cover crucial preparations to ensure a successful FRP bypass . By following these steps, you can avoid potential failures:

1. Important Notes and Warnings

Before proceeding with the Vivo V30 Lite 5G FRP bypass, there are some essential things to keep in mind:

1. Legal and Ethical Use: It is crucial to emphasize that bypassing FRP should only be done on devices that you own. Engaging in unauthorized bypassing FRP for illegal purposes may lead to legal consequences.
2. Warranty Void: Bypassing FRP may void the warranty of your device. If your Vivo V30 Lite 5G is still under warranty, consider contacting the manufacturer or authorized service center for help.
3. Security Risks: Bypassing FRP can potentially expose your device to security risks. Only follow trusted guides and sources to avoid installing malicious software.

2. Required Tools and Equipment

To bypass Vivo V30 Lite 5G FRP, you will need the following tools and equipment:

1. A desktop computer or laptop with strong internet connectivity.
2. A USB cable to connect your Vivo V30 Lite 5G to the computer.
3. Access to third-party software for bypassing FRP.

3. Backup Your Data

If you have recently bought a used Vivo V30 Lite 5G and don’t know the Google account credentials, it can trigger FRP on factory reset. Before factory resetting your device, it is essential to back up the data. Since the Google account on your device doesn’t belong to you, you will need to use third-party tools to create local backups.

The best tool in this scenario to use is Wondershare Dr.Fone . With the help of this tool, you can back up the entire data of your Vivo V30 Lite 5G to your computer.

4. Ensure a Stable Internet Connection

A stable and reliable internet connection is vital for a smooth FRP bypass. Make sure your computer and Vivo V30 Lite 5G are connected to the internet throughout the process. FRP bypassing will need you to download related files to complete the procedure.

Part 3: Step-by-Step Guide: How To Bypass Vivo V30 Lite 5G FRP

With the necessary preparations, it’s time to embark on the step-by-step guide for the Vivo Y15 FRP bypass. This section will explore three different methods for bypassing FRP. The first method involves using your Google account credentials, the official way to bypass FRP:

Method 1: Using Google Account Credentials

Before attempting this method, ensure that you have access to the Google account associated with your Vivo V30 Lite 5G. If you’ve forgotten your account details, use Google’s account recovery options before proceeding. Here’s how to bypass Vivo V30 Lite 5G FRP using your Google account credentials:

• Step 1: Power on your Vivo V30 Lite 5G and choose the desired language. Afterward, connect your phone to a stable Wi-Fi network. Next, proceed through the Vivo V30 Lite 5G device setup until you reach the FRP verification screen.

• Step 2: When prompted to verify your Google account, enter the associated email address and password. Ensure that you have a working and high-speed Wi-Fi connection during this step.

• Step 3: After entering the correct Google account credentials, the Vivo V30 Lite 5G device will verify the information. If the details are correct, FRP will be bypassed, and you will gain access to your Vivo V30 Lite 5G.

Method 2: Using FRP Bypass Tools

To bypass the FRP on Vivo V30 Lite 5G, you can utilize a specialized tool designed for this purpose. One highly recommended tool is Wondershare Dr.Fone . It is known for its reliability in bypassing FRP locks on various Android devices. This tool supports 15+ different brands with 2000+ Android devices for FRP bypassing.

Apart from bypassing the FRP lock, this tool is also an expert in unlocking other device locks. These include PIN, pattern, password, fingerprint, and face locks. With the help of this tool, you can unlock Samsung and LG devices without data loss. Here are the step-by-step instructions to perform the Vivo V30 Lite 5G FRP bypass:

Dr.Fone - Screen Unlock (Android)

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

• 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 6-13).
• Provide specific removal solutions to promise good success rate.

4,008,672 people have downloaded it

• Step 1: Access Screen Unlock in Wondershare Dr.Fone

Start by installing Wondershare Dr.Fone on your computer, then launch the application. Afterward, navigate to the “Toolbox” tab and select “Screen Unlock.” Follow it by clicking on “Android” on the next screen. Choose “Remove Google FRP Lock” among the available options for screen unlocking.

• Step 2: Select Remove Google FRP Lock To Proceed

On the following screen, select “Vivo” as the targeted phone brand and click “Start.” Wondershare Dr.Fone will now download the necessary driver required for Vivo V30 Lite 5G FRP bypassing.

• Step 3: Complete the Vivo V30 Lite 5G FRP Bypass Process

Once the driver download is complete, turn off your Vivo V30 Lite 5G smartphone. Now, connect the turned-off device to your computer while simultaneously pressing both volume keys for at least 3 seconds. This action will trigger the FRP bypass process, which should take a few minutes to complete.

Method 3: Using Combination File

The third method on the list for Vivo V30 Lite 5G FRP bypass is using a combination file. In this method, you will need to use a specialized tool to bypass the FRP lock by putting your Vivo V30 Lite 5G phone into Recovery Mode. The detailed steps for this method are following:

• Step 1: Begin by downloading the Vivo FRP unlock tool  (Password: GADGETSDOCTOR) on your computer and extract it. Now run the .exe file from the extracted content to install it. Afterward, turn off your Vivo V30 Lite 5G and put it into Recovery Mode.

• Step 2: To put Vivo V30 Lite 5G into Recovery Mode, you will need to simultaneously press and hold the “Power” and “Volume Up” keys together. Hold these keys until you see Fastboot Mode on the screen. Here use the Volume keys to select Recovery Mode.
• Step 3: Within Recovery Mode, select “Advanced Options,” and on the following screen, choose “Reboot with adb.” Now wait for your phone to turn on and later connect it to the computer with FRP unlock tool installed.

• Step 4: On the Vivo FRP lock tool interface, tap any key and press enter to check if your device is properly connected. Now repeat the process once again and wait for your Vivo V30 Lite 5G to reboot. Once the rebooting process is completed, check to confirm if the FRP lock has been bypassed.

Part 4. Troubleshooting and Tips

Navigating the workings of the Vivo V30 Lite 5G FRP bypass can be challenging. As with any security feature, FRP is designed to protect your data and device. It makes the bypassing process a delicate task. This part will address common issues faced during FRP bypass attempts.

It will also offer valuable tips to ensure a successful process. Moreover, it will explore alternative methods should the initial approaches prove unsuccessful.

Common Issues Faced During Bypassing Vivo V30 Lite 5G FRP

• Incorrect Google Account Credentials: One of the most common issues during FRP bypass is entering incorrect Google account credentials. Double-check the email address and password associated with the Vivo V30 Lite 5G device.
• Unstable Internet Connection: A stable internet connection is crucial during the FRP bypass process. Ensure your device is connected to the internet throughout the procedure and it is not unstable.
• Outdated Software: Using outdated or incompatible tools may result in unsuccessful bypass attempts. Always ensure you are using the latest version of the tool or method.
• Device Compatibility: Not all bypass methods are universally compatible with all Android devices. Ensure that the method you choose is intended for use with the Vivo V30 Lite 5G.

Tips To Ensure a Successful Bypass Process

1. Back-Up Data: Before attempting any bypass method, back up your important data because it will prevent accidental loss during the process.
2. Verify Official Methods: Always focus on official methods, such as using Google account credentials. They are better than third-party tools or combination files.
3. Use Reputable Sources: If you opt for alternative tools or methods, download them from reputable sources. It will help you avoid malware or security risks.
4. Read User Reviews: If using third-party tools, read user reviews and forums. This will help you gauge their effectiveness and safety.
5. Follow Instructions Carefully: Whether using official methods or alternative tools, follow instructions diligently to avoid mistakes.

Alternative Methods or Tools if the Initial Methods Fail

If the initial methods discussed in this article are failed to bypass the Vivo V30 Lite 5G FRP, then try these alternate methods to turn off the FRP lock:

1. Contact the Original Owner for Google Account Credentials

If you have bought the Vivo V30 Lite 5G in used condition and it is FRP-locked, try contacting the original owner. They might have the necessary account information to complete the verification process. In case they are able to provide you with Google account credentials, the process to bypass the Vivo V30 Lite 5G FRP lock becomes easy and quick.

2. Contact Vivo Customer Services

Have you tried various methods to bypass FRP on your Vivo V30 Lite 5G without success? It is the right time to contact professionals. Get in touch with Vivo’s official customer services or visit an authorized service center. They have the expertise to handle device-related issues, including FRP lockouts. Explain your situation to the support staff, and they will guide you through the appropriate steps to regain access.

Conclusion

In this comprehensive guide, we have explored various methods for the Vivo V30 Lite 5G FRP bypass. While there are several methods available, we highly recommend using the Wondershare Dr.Fone as the best choice. Dr.Fone is a reputable and reliable tool that offers a seamless and secure FRP bypass process.

It prioritizes data integrity and user privacy. Moreover, its clean interface ensures that even users with limited tech knowledge can use the bypassing process with ease.

How To Bypass Vivo V30 Lite 5G FRP In 3 Different Ways

Are you having trouble bypassing Vivo V30 Lite 5G FRP? If so, you’re not alone. A lot of people are struggling with this particular task. But don’t worry - We are here to help.

Since many Vivo V30 Lite 5G users do not need to log in more than once, they commonly forget their Google email and password.

If you have used this device for an extended period, you might have forgotten the password. A factory reset requires you to log in to your Vivo V30 Lite 5G device and use the same Gmail account.

To unlock the Vivo V30 Lite 5G smart 5 FRP, you must use any bypassing tool or method. In this blog post, I’ll walk you through the process of bypassing Vivo V30 Lite 5G FRP. So read on for instructions on how to get the job done.

Let’s get started!

Part 1: Some Common Reasons To Bypass Vivo V30 Lite 5G FRP

Vivo V30 Lite 5G devices are often bypassed for the following reasons:

1. Forgotten Google Account Credentials

One of the most common reasons for needing to bypass FRP is that you simply forgot your Google account login credentials. Whether you have a new phone and are setting it up for the first time, or you’ve had the same phone for a while and are just now adding a Google account, there’s always a chance that you might forget your password.

2. A Second-Hand Phone

Another common reason for wanting to bypass FRP is if you’ve purchased a second-hand phone. If the previous owner of the phone didn’t correctly remove their Google account from the Vivo V30 Lite 5G device before selling it to you, then you’ll be stuck with their account on the phone and won’t be able to use it yourself until you bypass FRP.

3. Factory Reset In An Untrusted Environment

If you’ve performed a factory reset on your phone to try and fix an issue or start fresh, you’ll need to bypass FRP to use the Vivo V30 Lite 5G device again. It is because a factory reset will also remove your Google account from the phone, leaving you locked out unless you can remember the login credentials.

Part 2: Bypass Vivo V30 Lite 5G FRP With 3 Easy Methods

Bypassing FRP can be a bit tricky, but it’s possible to do it if you have the right tools and know-how. If you’re looking for a quick and easy way to bypass FRP on your Vivo V30 Lite 5G device, below are the methods you can use to Vivo V30 Lite 5G Hot 10 FRP bypass.

Method #1: Recover the Google Account Of Your Device

Performing a Factory Reset requires restoring a Google account. It is advisable to recover your email ID or password from another device before attempting Vivo V30 Lite 5G Hot 8 FRP bypass.

You can solve the problem if you have an alternate email address or phone number associated with the account you want to recover. By inserting a verification code, you can easily change the password for your Google account.

After resetting your password, it will take 24 to 72 hours to sync the new password with all devices registered to the account.

Once synced, you can perform a factory data reset by providing an email and a new password. Following this method, you can factory reset your Vivo V30 Lite 5G Hot S without bypassing FRP.

However, if you provide the wrong password in this process, the time will restart for the next 24-72 hours to sync.

So, be careful when entering your email and password on the Vivo V30 Lite 5G device.

Method #2: Bypass Vivo V30 Lite 5G FRP With FRP Bypass APK

Vivo V30 Lite 5G Hot 8 FRP bypass is done using FRP Bypass APK, an Android application. FRP Bypass APK will prove helpful if you cannot retrieve your Google account, which is logged into your Vivo V30 Lite 5G smart 5 FRP bypass.

The APK lets you remove the Google account verification process without a password. You can use this method for free, safely, and quickly.

If you use FRP Bypass APK, you can bypass FRP lock on Vivo V30 Lite 5G Hot 10 FRP bypass and any Android phone running version 5.1 or higher.

Using FRP Bypass APK, you can unlock Google lock on the Vivo V30 Lite 5G Hot 8 FRP bypass:

Step 1: Download the latest FRP Bypass, Following the official website.

Step 2: Copy the APK file to a USB drive.

Step 3: Use an OTG cable to connect the flash drive and Vivo V30 Lite 5G Hot 10 FRP bypass, pulling up a file explorer.

Step 4: After downloading the app, you must install it on your smartphone. You must enable unknown sources before installing.

Step 5: Select the settings menu in the app after completing the installation process.

Step 6: Click on the “Backup and Reset” option.

Step 7: Click the Factory Data Reset button, then select Confirm.

Step 8: The Google account verification will be removed without a password within a few seconds.

Step 9: Restart your device after completing all the procedures.

Step 10: Create a new Google account or skip the option to do so later.

Vivo V30 Lite 5G Hot 8 FRP bypass using FRP Bypass APK is a simple method that a beginner can utilize.

Method #3: Bypass Vivo V30 Lite 5G FRP Without PC Via Settings Menu

Do you want to bypass the Google account verification FRP on the Vivo V30 Lite 5G Smart 5 phone? Using this method, you can bypass the FRP on Vivo V30 Lite 5G Smart 5.

Wait until the Vivo V30 Lite 5G Hot 8 reboots and prompts you to select a language before performing a factory reset.

You can follow the steps below after selecting:

Step 1: Set up Wi-Fi on the Vivo V30 Lite 5G Smart 5.

Step 2: A Google account request page will appear.

Step 3: After tapping the text box, the keyboard will appear.

Step 4: As soon as you click the “@” button, the settings menu will appear.

Step 5: Choose Google keyboard layout from the list. Check it and ensure that the Google keyboard layout is correct.

Step 6: Click on the three dots in the upper right corner of the screen.

Step 7: Select “Help & Feedback” after opening a new page.

Step 8: Click on the search button and send the result from the keyboard once the new dialog box has been opened.

Step 9: Then ignore the guide; it will show you how to do it.

Step 10: Click and hold any word on your screen to highlight it in blue.

Step 11: Click the “Web Search” button on the right-hand side of the screen.

Step 12: A new page guides you through the next step. You can see the web results for the word you just Googled using the Google App.

Step 13: Find the search box in the upper center of the page. Click the search button after typing “setting” in the search bar.

Step 14: You will now see a system settings icon on your home screen. You can reset the factory data by clicking on the following steps: system setting icon > Backup & Reset > Factory Data Reset.

Step 15: Reset the Vivo V30 Lite 5G device to factory settings. After completing the reset, you will see the Vivo V30 Lite 5G Smart 5 welcome page.

Step 16: Reconnect your Vivo V30 Lite 5G to your Wi-Fi network. The phone will instead ask you to add a new Google account if you can do it successfully.

Step 17: Sign up for a Google account, and then the Vivo V30 Lite 5G Smart 5 is ready to use.

Bypassing the FRP on your Vivo V30 Lite 5G Smart 5 is as simple as following these steps.

Conclusion

It is not illegal to bypass Google verification when you are doing a factory reset in case you forget your password or don’t remember your Google account. The Vivo V30 Lite 5G Smart 5 FRP bypass becomes useless if you don’t bypass the FRP lock, so FRP bypass Vivo V30 Lite 5G Hot S matters.

You can bypass the Vivo V30 Lite 5G Hot 8 FRP by using a few practical methods listed above. You can try another whenever one of the above procedures does not work accurately.