Vivo Y91i PD1818EF
Vivo Y91i PD1818EF is a Vivo firmware file listed under Vivo, distributed as Vivo_Y91i_PD1818EF_EX_A_1.8.7_LA.UM.6.6.2.r1-04200-89XX.0_SDM439_QPST.zip with a download size of 3 GB. It is built for the Qualcomm SDM439 chipset. It is flashed with QFIL (part of Qualcomm QPST). It was published on April 28, 2026. This page has been viewed 20 times. It is available to download free of charge. Before flashing, verify the file matches your exact device model and back up your data.
About Vivo Y91i PD1818EF
Vivo Y91i PD1818EF Stock Firmware (Flash File) The Flash File will help you Upgrade, Downgrade, or re-install the Stock Firmware (OS) on your Mobile Device. In addition, the Flash File (ROM) also enables you to repair the Mobile device if facing any Software Issue, Bootloop Issue, IMEI Issue, or Dead Issue. File Name: Vivo_Y91i_PD1818EF_EX_A_1.8.7_LA.UM.6.6.2.r1-04200-89XX.0_SDM439_QPST.zip File Size: 3 GB Flash Tool: QPST Flash Tool How to Flash (install): Follow Tutorial Mirror 1 (Free)Mirror 2 (Paid)
File Details
| File name | Vivo Y91i PD1818EF |
|---|---|
| Package | Vivo_Y91i_PD1818EF_EX_A_1.8.7_LA.UM.6.6.2.r1-04200-89XX.0_SDM439_QPST.zip |
| Brand / Platform | Vivo |
| Category | Vivo |
| Chipset | Qualcomm SDM439 |
| Flash tool | QFIL (part of Qualcomm QPST) |
| Package format | ZIP archive |
| File size | 3 GB |
| Date added | April 28, 2026 |
| Price | Free |
How to flash Vivo Y91i PD1818EF with QFIL
- Confirm Vivo Y91i PD1818EF matches your exact device model and that the phone uses the SDM439 chipset.
- Back up your personal data, as flashing firmware can erase the device. Charge the battery above 50%.
- Download the file (3 GB) using the button above and extract it on a Windows PC.
- Install the Qualcomm HS-USB QDLoader 9008 driver, then open QFIL (part of Qualcomm QPST).
- In the tool, load the programmer (prog_*_firehose*.mbn/.elf) and rawprogram/patch XML files from the extracted folder.
- Start the flash, then boot the phone into EDL mode (9008) — usually via key combo, test point, or "adb reboot edl".
- Wait for the success message before disconnecting. QFIL must detect "Qualcomm HS-USB QDLoader 9008" before you press Download.
Guides for this firmware
- Vivo Firmware Guide: Finding and Flashing Stock ROMsTo reflash or unbrick a Vivo device, you must identify the specific chipset used by your model and use the corresponding flashing tool. By downloading the correct stock ROM and following the…
- How to Get Qualcomm Phones into EDL Mode for QFILTo get a Qualcomm-based phone into EDL (Emergency Download) mode for QFIL, you must trigger a specific boot state that allows the device to be recognized by your PC as a "Qualcomm HS-USB QDLoader…
- How to Fix QFIL Sahara Fail ErrorThe Sahara Fail error in QFIL occurs when the initial communication between the computer and the Qualcomm device fails. This prevents the tool from uploading the Firehose programmer, which is…
Frequently asked questions
Is Vivo Y91i PD1818EF free to download?
Yes, Vivo Y91i PD1818EF can be downloaded free of charge from this page.
How large is the download?
The Vivo Y91i PD1818EF package is 3 GB.
Which tool do I need to flash Vivo Y91i PD1818EF?
Vivo Y91i PD1818EF is Qualcomm SDM439 firmware, so it is flashed with QFIL (part of Qualcomm QPST) using the programmer (prog_*_firehose*.mbn/.elf) and rawprogram/patch XML files.
Which devices is this firmware for?
This file is intended for Vivo devices. Always confirm it matches your specific model before flashing.