Removing forgotten screen locks (pattern, PIN, or password). Bypassing Google Factory Reset Protection (FRP).
Ensure the device is completely powered down. Disconnect the battery connector from the motherboard if the phone is disassembled.
Vivo V9 Pro (model PD1730CF) requires a specific programmer file, known as the prog_emmc_firehose vivo v9 pro progemmcfirehose 2021
The "2021" version refers to the updated, tested, or signed loaders circulating in 2021 that successfully bypassed security checks,, making them essential for unbricking the device. Prerequisites for Using the Firehose File
. This file is essential for unbricking, repairing dead boot issues, or bypassing locks. Cellebrite Post Details: Vivo V9 Pro Firehose 2021 File Name: prog_emmc_firehose_Sdm660_ddr.elf (standard for Release Context: In 2021, Vivo released the PD1730CF_EX_A_6.70.10 Removing forgotten screen locks (pattern, PIN, or password)
Ensure your device is the PD1730CF (Pro) and not the standard V9 (PD1730F) or V9 Youth (PD1730BF), as using the wrong firehose can hard-brick the device.
By 2021, safer methods existed for Vivo V9 Pro: Disconnect the battery connector from the motherboard if
Removing the Factory Reset Protection (Google Account Lock) after an unauthorized factory reset.