Q1. What happens if I flash kunzite China ROM on global hardware?

Device will lose Google Play, NFC, carrier features, and can become unbootable until flashed back to correct region.

Q2. Does fastboot flashing fix bootloop or modem lock?

Correct ROM restores Chinese device bootloop and corrupt system, but cannot unlock regions or bypass carrier locks.

Q3. Will downgrading fix bugs?

No. Modern HyperOS/Android 15 devices block downgrades; attempts risk hard brick and irrecoverable loss of functionality.

Xiaomi

Xiaomi Redmi Note 15 5G (kunzite) China HyperOS 2.0 Fastboot Firmware

ByDan November 23, 2025

The Xiaomi Redmi Note 15 5G (codename: kunzite) is a next-gen mid-range powerhouse released in August 2025, featuring the Qualcomm Snapdragon 6 Gen 3 (4nm) chipset, 8GB/12GB RAM, and a 5800mAh battery with 45W fast charging. It ships with Android 15 (HyperOS 2.0) and is region locked for Chinese hardware. Real-world users report battery calibration issues, modem/SIM failures, and bricking when attempting cross-region flashes.

CRUCIAL WARNING:

This “kunzite” ROM is region-locked to China hardware only! Cross-flashing Global/EU firmware disables modem, NFC, Google Play, and can cause unbootable device or hardware faults.
Never downgrade to Android 14/AOSP from stock Android 15 + HyperOS – hard brick risk is severe; no EDL deep unbrick for Snapdragon 6 Gen 3!
Confirm you have the proper “kunzite” model via fastboot getvar product before flashing.

Prerequisites: Before You Begin

Click Here for Essential Pre-Flashing Checklist

Full Backup: Fastboot flash will erase all data and apps.
Battery: Minimum 50% charge, use OEM cable.
Bootloader: Unlock using Xiaomi’s official process (Mi Unlock Tool).
Region Verification: Only use kunzite China ROM on Chinese-sold Redmi Note 15 5G.

Redmi Note 15 5G (“kunzite”) China Firmware Details

Codename: kunzite
Device Model: Xiaomi Redmi Note 15 5G (China)
Chipset: Qualcomm SM6475-AB Snapdragon 6 Gen 3 (4nm), Octa-core (4×2.4GHz Cortex-A78 & 4×1.8GHz Cortex-A55), Adreno 710 GPU
Android Version: Android 15, HyperOS 2.0
RAM/Storage: 8GB/12GB RAM, 256GB Storage
Battery: 5800mAh, 45W fast charging
Display: 6.77-inch AMOLED, 120Hz, FHD+

Required Tools & Downloads

File / Tool	Download Link
Mi Flash Tool (Qualcomm)	Download Mi Flash Tool
Qualcomm USB Drivers	Download Drivers

Official “kunzite” HyperOS 2.0 Fastboot ROM (China)

Filename	Build/Android	Region	Build Date	Size	Flashing Type	Notes	Download Link
kunzite_images_OS2.0.206.0.VPQCNXM_20251022.0000.00_15.0_cn_bd5c880190.tgz	OS2.0.206.0 (HyperOS 2.0, Android 15)	China (kunzite only)	2025-10-22	7.21GB	Fastboot (.tgz, Mi Flash Tool)	Locked to China hardware, disables GMS & NFC on global units	Download

Quick Flashing Guide (“kunzite” China, Fastboot ROM)

Unlock bootloader officially. Extract the firmware kunzite_images_OS2.0.206.0.VPQCNXM_20251022.0000.00_15.0_cn_bd5c880190.tgz.
Install Qualcomm USB drivers. Run Mi Flash Tool on PC.
Boot phone to Fastboot (hold Vol Down + Power while off). Connect via USB.
Load the ROM’s images folder. Use “clean all”, click “Flash”.
Wait for success, disconnect, and reboot device.

Full guide:
Full Tutorial: How to Flash Xiaomi Firmware

Frequently Asked Questions (FAQs)

Q1. What happens if I flash kunzite China ROM on global hardware?: Device will lose Google Play, NFC, carrier features, and can become unbootable until flashed back to correct region.
Q2. Does fastboot flashing fix bootloop or modem lock?: Correct ROM restores Chinese device bootloop and corrupt system, but cannot unlock regions or bypass carrier locks.
Q3. Will downgrading fix bugs?: No. Modern HyperOS/Android 15 devices block downgrades; attempts risk hard brick and irrecoverable loss of functionality.