If performing a user-lock or FRP reset instead, navigate to the tool's partition manager, locate the Userdata or Config partitions, and clear them explicitly.
Which (QFIL, Miracle, UnlockTool, etc.) are you currently using?
As the Vivo V9 Pro aged, older firehose files became incompatible with newer firmware security patches rolled out over the years. The "2021" designation often refers to a specifically signed, updated, or modified firehose loader necessary to bypass these updated security measures in later Funtouch OS versions (such as those approaching or surpassing Android 9 Pie).
Are you able to get the PC to recognize the device as in Device Manager? vivo v9 pro progemmcfirehose 2021
. It acts as a bridge that allows a PC to communicate with the phone’s internal eMMC storage when the device is in Emergency Download (EDL) Mode
If the phone can reach Fastboot mode, use fastboot oem edl . 3. Loading the Firehose in QFIL Open QFIL. Select Flat Build .
: This means the file version is incorrect for your security patch. Ensure you are using the verified 2021 patch file and that your device model matches PD1730CF . 3. Device Manager shows "Unknown USB Device" If performing a user-lock or FRP reset instead,
In 2023 and 2024, the Vivo V9 Pro is aging, but thousands remain in use as backup phones or in developing markets. The remains the most reliable tool for reviving this model. Newer tools exist (like unlock tools with paid credits), but the 2021 loader is the last free, community-tested solution that works with the final Funtouch OS updates.
Short the two specific test points (located near the battery connector) with tweezers while connecting the phone to a PC via USB cable. Check Device Manager for Qualcomm HS-USB QDLoader 9008 Using the Firehose File: prog_emmc_firehose file into your chosen flash tool (e.g., UMT’s QC Fire). Select the correct Official Stock Firmware (PD1730CF). Important:
However, computer flashing tools cannot simply alter a phone's internal storage (eMMC or UFS) without authorization. This is where the file comes in: The "2021" designation often refers to a specifically
Click next to the Programmer Path and select your target prog_emmc_firehose file.
Contains the updated security signatures required to bypass authentication checks on Vivo devices running newer security patch levels. Prerequisites Before Flashing
Because the phone is likely bricked or locked, standard button combinations may not force EDL mode. You must use the :
Open the QFIL application on your PC. Under the "Select Build Type" section, choose . Step 2: Load the Firehose Programmer