Vivo Y91i (PD1818GF) Firmware Flash File Download [Stock Rom]

Looking to install the stock ROM on your Vivo Y91i? This comprehensive guide provides direct download links for the PD1818GF firmware flash file and clear, step-by-step instructions using SP Flash Tool.

Use this firmware file to effectively reset your phone, fix bootloop issues, bypass password locks, resolve device freezing, and address numerous other software problems.

Vivo Y91i Quick Specifications

Release Year:

2019

Display:

6.22-inch IPS LCD, 720 x 1520 pixels (~270 ppi density)

Processor:

MediaTek Helio P22 (MT6762), Octa-core 2.0 GHz

RAM:

2GB or 3GB

Storage:

16GB or 32GB internal, expandable via microSDXC

Operating System:

Launched with Android 8.1 (Oreo), Funtouch OS 4.5

Rear Camera:

13 MP single camera

Front Camera:

5 MP

Battery:

4030 mAh non-removable

Connectivity:

4G LTE, Wi-Fi 802.11 b/g/n, Bluetooth 5.0, microUSB 2.0

Other Features:

Face Access (no fingerprint sensor on some variants), 3.5mm headphone jack

The Vivo Y91i is a budget smartphone from 2019, positioned as a more affordable variant of the Vivo Y91. It features a large 6.22-inch “Halo FullView” display, a MediaTek Helio P22 processor, and a substantial 4030 mAh battery. Notably, it has a single 13MP rear camera and a 5MP front camera.

Vivo Y91i (PD1818GF) Firmware Download Links

Important Safety Notice

• Backup Your Data: This process will erase all your personal data. Ensure you have a backup before you proceed.
• Use the Correct Files: Flashing the wrong firmware for your specific PD1818GF model will likely brick your phone. Double-check everything.
• Charge Your Phone: Ensure your device has at least 50% battery to prevent it from shutting down during the flashing process.

Prerequisites: All Necessary Files and Tools

1. A Windows PC: SP Flash Tool is a Windows-based application.
2. USB Cable: A high-quality USB data cable.
3. SP Flash Tool: Download the latest version.
4. MediaTek (MTK) VCOM Drivers: Essential for your PC to recognize the phone correctly.
5. Firmware Package: The correct firmware for your device, downloaded from the table above.
6. MTK Auth Bypass Tool (for newer devices): Many modern MTK phones have security that must be disabled. If your phone is from 2020 or newer, you will likely need this.

Detailed Step-by-Step Instructions

Step 1: Prepare Your PC and Files

First, get your computer ready. Download all the required files from the links above. Create a new folder on your desktop to keep everything organized.

1. Install MTK VCOM Drivers: This is a critical first step. You may need to disable Windows Driver Signature Enforcement to install them correctly. If you are unsure how, a quick web search for “disable driver signature enforcement windows 10/11” will provide a guide.
2. Extract Tools & Firmware: Unzip the SP Flash Tool, the MTK Auth Bypass tool (if needed), and the firmware package. Inside the firmware folder, locate the “scatter file” – it’s a text file (`.txt`) that usually contains the chipset name, for example:MT6762_Android_scatter.txt.

Step 2: Load Firmware in SP Flash Tool

1. Run as Administrator: Navigate to the SP Flash Tool folder and right-click on flash_tool.exe, then select “Run as administrator”.
2. Load Scatter File: In the tool, click the “Scatter-loading File” button. Browse to your extracted firmware folder and select the .txt scatter file you identified earlier.
3. Check Partitions: The tool will load all the phone’s partitions. Ensure the dropdown menu is set to “Download Only”.CRITICAL WARNING: Verify that the “preloader” partition is CHECKED. If you flash without the preloader, you can brick your device. Also, NEVER use the “Format All + Download” option unless you are an expert, as it can erase your phone’s IMEI and other vital data.

Step 3: Flash the Firmware

This step combines the security bypass and the actual flashing. Read carefully.

1. Run the Auth Bypass Tool (For Newer Phones Only): If your Vivo Y91i requires it, open the MTK Auth Bypass tool now. Click its “Disable Auth” or “Bypass” button. The tool will now wait for a connection.
2. Begin Download in SP Flash Tool: Go back to the SP Flash Tool window (which already has your firmware loaded). Click the big green “Download” button at the top. The tool is now armed and waiting for the phone.
3. Connect Your Phone:
   • First, make sure your Vivo Y91i is completely powered off.
   • Press and hold both the Volume Up or Volume Up and Down buttons simultaneously. While holding them, connect the phone to your PC with the USB cable.”
4. Monitor the Process: The bypass tool will detect the phone first, and then SP Flash Tool will immediately begin flashing (you’ll see a red, then yellow progress bar). The process will take several minutes. DO NOT disconnect or touch the phone.
5. Wait for Success: The process is complete when a large pop-up window appears with a green checkmark and the words “Download OK”.

Step 4: Reboot Your Phone

Congratulations, the flash is complete! You can now safely disconnect your Vivo Y91i from the PC. Press and hold the Power button to turn it on.

Be patient, as the first boot can take 5-10 minutes while the system sets itself up. You will then be greeted by the initial Android setup screen.