Redmi Note 12 5G / Redmi Note 12R Pro (codename: sunstone) combines a 6.67-inch 120Hz AMOLED display with the Snapdragon 4 Gen 1 (6nm) platform, a 5000mAh battery, and 33W charging—making it a popular “smooth display + long battery” mid-range choice when software is stable. Users, however, commonly report post-update slowdowns (including camera lag/freezes) and abnormal battery drain after HyperOS updates, especially when the system update package or leftover data becomes inconsistent.
The official HyperOS 2.0 Fastboot ROMs listed below (plus the optional Xiaomi.eu package for advanced users) are designed to reinstall core system partitions cleanly, which can resolve update-related instability, bootloops, and performance regression on sunstone variants when normal OTA updates fail.
Redmi Note 12 5G (sunstone) Firmware Details
| Device Name | Xiaomi Redmi Note 12 5G / Redmi Note 12R Pro |
|---|---|
| Codename | sunstone |
| Chipset | Qualcomm Snapdragon 4 Gen 1 (SM4375, 6nm) |
| Key Hardware (quick check) | 6.67″ AMOLED 120Hz, 5000mAh, 33W wired charging |
| Android Version (these builds) | Android 14 |
| ROM Type | Fastboot ROM (.tgz “images”) + optional Xiaomi.eu Recovery ROM (.zip) |
| Flashing Tools | Xiaomi Mi Flash Tool (recommended) or Fastboot script (flash_all) |
| Bootloader Status | Unlocked bootloader is typically required for Xiaomi Fastboot flashing |
| Region Codes Explained | CNXM (China), MIXM (Global), INXM (India), EUXM (EEA/Europe), TWXM (Taiwan) |
Device codename and region branch naming are widely used across official firmware trackers for sunstone builds.
⚠️ Flashing Risks & Disclaimer
- Flashing firmware on Redmi Note 12 5G / 12R Pro (sunstone) is high risk: choosing the wrong region build (CNXM vs MIXM vs EUXM vs INXM vs TWXM) can lead to bootloops, missing network features, or failed verification.
- Fastboot ROM installs are often used to recover from severe update problems, but a clean flash commonly wipes data—backups are essential before proceeding.
- Because this is a 5G device, a wrong or interrupted flash can break radio-related partitions and cause “no signal / no network” symptoms that are harder to fix than normal app issues.
- An unlocked bootloader is typically required for Xiaomi Fastboot flashing; attempting to flash while locked may fail and waste time during recovery.
- All flashing is performed at the user’s own risk; ensure sunstone compatibility, correct region, and stable USB/power throughout the process.
Download Official Firmware for Redmi Note 12 5G (sunstone)
| Filename | File Size | Build Date | Build Version | Android | Type / Region | Download |
|---|---|---|---|---|---|---|
| sunstone_images_OS2.0.6.0.UMQCNXM_20250812.0000.00_14.0_cn_29df442157.tgz | 5.93 GB | 2025-08-12 | OS2.0.6.0.UMQCNXM | 14 | Fastboot ROM (China / CNXM) | Download OS2.0.6.0.UMQCNXM (Xiaomi BigOTA) |
| sunstone_global_images_OS2.0.5.0.UMQMIXM_20251020.0000.00_14.0_global_f4ad534bf4.tgz | 5.92 GB | 2025-10-20 | OS2.0.5.0.UMQMIXM | 14 | Fastboot ROM (Global / MIXM) | Download OS2.0.5.0.UMQMIXM (Xiaomi BigOTA) |
| sunstone_in_global_images_OS2.0.6.0.UMQINXM_20250821.0000.00_14.0_in_7941d8a8c6.tgz | 5.12 GB | 2025-08-21 | OS2.0.6.0.UMQINXM | 14 | Fastboot ROM (India / INXM) | Download OS2.0.6.0.UMQINXM (Xiaomi BigOTA) |
| sunstone_eea_global_images_OS2.0.6.0.UMQEUXM_20251020.0000.00_14.0_eea_bb2b064f87.tgz | 5.67 GB | 2025-10-20 | OS2.0.6.0.UMQEUXM | 14 | Fastboot ROM (EEA / EUXM) | Download OS2.0.6.0.UMQEUXM (Xiaomi BigOTA) |
| sunstone_tw_global_images_OS2.0.6.0.UMQTWXM_20250821.0000.00_14.0_tw_f406b328a4.tgz | 5.25 GB | 2025-08-21 | OS2.0.6.0.UMQTWXM | 14 | Fastboot ROM (Taiwan / TWXM) | Download OS2.0.6.0.UMQTWXM (Xiaomi BigOTA) |
| xiaomi.eu_SUNSTONE_OS2.0.6.0.UMQCNXM_14.zip | 4.25 GB | (Varies by release mirror) | OS2.0.6.0.UMQCNXM | 14 | Xiaomi.eu ROM (Custom / Recovery flash) | Download Xiaomi.eu OS2.0.6.0 (SourceForge) |
Sunstone is widely tracked as Redmi Note 12 5G/Note 12R Pro across firmware databases, and OS2.0.x builds are listed as Android 14 HyperOS 2.0 updates by region.
Optional: Custom Recovery Downloads (sunstone)
| File | Size | Use | Download |
|---|---|---|---|
| twrp-3.7.1_12-0-v1b-sunstone-Mechatron.img | 128 MB | Recovery image (advanced flashing / ROM installs) | Download TWRP for sunstone (SourceForge) |
| OrangeFox-Unofficial-sunstone.zip | 68 MB | Custom recovery package (advanced flashing / maintenance) | Download OrangeFox for sunstone (SourceForge) |
Flashing Requirements
- A Windows PC, stable USB cable, and enough storage to extract a 5–6GB
.tgzfastboot package. - Fastboot mode access on Redmi Note 12 5G (sunstone) for official
sunstone_..._images_*.tgzpackages. - Unlocked bootloader is typically required for Xiaomi Fastboot flashing workflows.
- For Xiaomi.eu (
xiaomi.eu_SUNSTONE_...), a working custom recovery (TWRP/OrangeFox) is typically required.
How to Flash the Firmware
A) Official Fastboot ROM (.tgz) via Mi Flash Tool
- Download the correct region build for sunstone (CNXM/MIXM/INXM/EUXM/TWXM) and extract the
.tgzuntil the “images” folder/scripts appear. - Boot Redmi Note 12 5G into Fastboot mode, then connect it to the PC via USB.
- Open Xiaomi Mi Flash Tool, select the extracted ROM folder, and confirm the device is detected.
- Start flashing (a clean flash may wipe data), then wait for completion without disconnecting the cable.
- Reboot and allow extra time for the first boot; stability issues caused by a bad/partial update package are often resolved after a clean reinstall.
B) Xiaomi.eu ROM (.zip) via Custom Recovery (Advanced)
- Ensure the device is sunstone and has a compatible custom recovery (example files: TWRP/OrangeFox downloads above).
- Copy
xiaomi.eu_SUNSTONE_OS2.0.6.0.UMQCNXM_14.zipto the phone storage (or sideload method if preferred). - Boot to recovery, then flash the Xiaomi.eu zip as instructed by the recovery interface.
- Reboot and complete initial setup; performance complaints after HyperOS updates are often tied to leftover caches/settings that a clean install can remove.
- If boot issues persist, return to the matching official Fastboot ROM for the phone’s region branch.
For a detailed flashing walkthrough with pictures and videos, use the Xiaomi Mi Flash Tool guide.
For script-based Fastboot flashing, use the flash-all guide.
Frequently Asked Questions (FAQs)
Which phone model uses the sunstone codename?
Sunstone is used for Xiaomi Redmi Note 12 5G (and related variants like Note 12R Pro in some markets), so firmware marked “sunstone” is intended for that codename family.
What does UMQMIXM / UMQEUXM / UMQINXM / UMQTWXM / UMQCNXM mean?
These are Xiaomi region branches: MIXM (Global), EUXM (EEA/Europe), INXM (India), TWXM (Taiwan), and CNXM (China), and matching the correct branch is critical for a safe flash.
Can these firmwares fix HyperOS battery drain on Redmi Note 12 5G?
Battery drain has been widely discussed by HyperOS users, and a clean fastboot reinstall is often used when the update package is suspected to be corrupted or the system becomes inconsistent after upgrades.
Can a fastboot ROM fix “everything is slow” or camera lag after updating to HyperOS?
Slowdowns and camera lag after a major OS update are frequently reported, and reinstalling stock firmware is a common “clean baseline” fix when simple troubleshooting does not help.
Will flashing OS2.0.x wipe data on sunstone?
Data wipe is common with clean fastboot flashing and is frequently recommended for fixing serious post-update issues, so backups should be treated as mandatory before proceeding.
Is Xiaomi.eu SUNSTONE OS2.0.6.0.UMQCNXM the same as the official Global ROM?
No—Xiaomi.eu builds are custom community ROMs based on Xiaomi releases (often China-based), while official Global firmware for sunstone typically uses the UMQMIXM branch.
