SP Flash Tool and Auth File for Vivo Y91i - How to Reset Pattern and FRP Lock
Vivo Y91i Pattern Unlock File Download
Vivo Y91i is a smartphone that was released in March 2019 in India. It has a 6.22-inch IPS LCD display, a MediaTek Helio P22 processor, 2 GB or 3 GB of RAM, 16 GB or 32 GB of internal storage, a 13 MP rear camera, a 5 MP front camera, and a 4030 mAh battery. It runs on Android 8.1 Oreo with Funtouch OS 4.5.
If you have forgotten the pattern lock of your vivo y91i, you may not be able to access your phone or its data. In such cases, you may need to unlock the pattern lock using some tools and files. In this article, we will show you three methods to unlock the pattern lock of your vivo y91i using different tools and files. Before proceeding, make sure you have backed up your important data, as these methods may erase your phone's data.
vivo y91i pattern unlock file download
Download File: https://www.google.com/url?q=https%3A%2F%2Ft.co%2FoML8ujqGEE&sa=D&sntz=1&usg=AOvVaw0ImZTKsYNp313d5gaW5fVc
Method 1: Using Vivo Flash Tool
Vivo Flash Tool is a tool that lets users flash firmware, recovery, or custom ROMs on vivo phones. It works for both MediaTek and Qualcomm based phones. You can use this tool to flash the stock firmware on your vivo y91i and remove the pattern lock. Here are the steps to do so:
Download Vivo Flash Tool from and install it on your Windows PC.
Download Vivo USB Driver from and install it on your PC.
Download the stock firmware for your vivo y91i from and extract it on your PC.
Open Vivo Flash Tool and switch to the MediaTek tab.
Select Country on the top left.
Load the scatter file from the firmware folder.
Select Operation Mode as Format All + Download.
Click on Download.
Turn off your phone and connect it to the PC via USB cable while holding Volume Up button.
The tool will start flashing the firmware on your phone and remove the pattern lock.
Once done, disconnect your phone and reboot it.
Method 2: Using SP Flash Tool
SP Flash Tool is another tool that lets users flash DA and Auth files on MediaTek based phones. You can use this tool to flash DA and Auth files on your vivo y91i and remove the pattern lock and FRP lock. Here are the steps to do so:
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Download SP Flash Tool from and extract it on your PC.
Download Vivo Y91i DA & Auth File from and extract it on your PC.
Open SP Flash Tool and click on Choose in front of Scatter-loading File.
Select the scatter file from the DA & Auth File folder.
Click on Choose in front of Authentication File.
Select the auth file from the DA & Auth File folder.
Click on Format tab and enter address: 0x5588000 0x100000.
Click on Start and connect your phone to the PC via USB cable while holding Volume Up button.
The tool will format the user data and FRP partitions on your phone and remove the pattern lock and FRP lock.
Once done, disconnect your phone and reboot it.
Method 3: Using Vivo ADB Format Tool
Vivo ADB Format Tool is a tool that lets users bypass the pattern lock and FRP lock on vivo phones using ADB commands. You can use this tool to bypass the pattern lock and FRP lock on your vivo y91i without flashing any files. Here are the steps to do so:
Download Vivo ADB Format Tool from and extract it on your PC.
Download Vivo USB Driver from and install it on your PC.
Enable USB Debugging on your phone by going to Settings > About Phone > Tap on Build Number 7 times > Go back to Settings > Developer Options > Turn on USB Debugging.
Open Vivo ADB Format Tool and enter the same port number as shown in Device Manager under Ports (COM & LPT).
Click on BTN2 and connect your phone to the PC via USB cable.
The tool will detect your phone and send some ADB commands to bypass the pattern lock and FRP lock.
Once done, disconnect your phone and reboot it.
Conclusion
In this article, we have shown you three methods to unlock the pattern lock of your vivo y91i using different tools and files. You can choose any of these methods according to your preference and convenience. However, before using any of these methods, make sure you have backed up your important data, as these methods may erase your phone's data. Also, be careful while following the steps and do not skip any of them. We hope this article was helpful for you. If you have any questions or suggestions, feel free to leave a comment below.
FAQs
Q: What is the difference between pattern lock and FRP lock?
A: Pattern lock is a security feature that lets users set a pattern to unlock their phone's screen. FRP lock is a security feature that prevents unauthorized users from accessing the phone after a factory reset. FRP stands for Factory Reset Protection.
Q: What are the benefits of unlocking the pattern lock of vivo y91i?
A: Unlocking the pattern lock of vivo y91i can help you access your phone and its data if you have forgotten the pattern. It can also help you remove any malware or viruses that may have infected your phone. It can also help you install custom ROMs or root your phone if you want to.
Q: What are the risks of unlocking the pattern lock of vivo y91i?
A: Unlocking the pattern lock of vivo y91i can void your phone's warranty and may cause some issues with your phone's performance or functionality. It may also erase your phone's data or cause data loss or corruption. It may also expose your phone to security threats or hackers.
Q: Where can I find more tools and files for unlocking the pattern lock of vivo y91i?
A: You can find more tools and files for unlocking the pattern lock of vivo y91i on various websites or forums that provide such resources. However, be careful while downloading or using any of these tools or files, as some of them may be harmful or malicious for your phone or PC. Always scan them with an antivirus before using them and follow the instructions carefully.
Q: How can I prevent forgetting the pattern lock of vivo y91i?
A: You can prevent forgetting the pattern lock of vivo y91i by choosing a simple and easy-to-remember pattern that you can recall quickly. You can also write down or save your pattern somewhere safe and secure that only you can access. You can also use other security features such as fingerprint, face, or PIN to unlock your phone instead of pattern.