Q1. What device is codename sea?

Official ROM trackers list sea as Redmi Note 12S, and the fastboot package names above are explicitly labeled for that codename.

Q2. Which ROM should I download to fix HyperOS 2 battery drain on Redmi Note 12S?

Use the newest fastboot ROM that matches your original branch (for example MIXM for Global or EUXM for EEA), because battery drain/heating issues are commonly reported after HyperOS 2 updates and a clean, matching flash is the safest reset.

Q3. Can I flash Global (MIXM) on an EEA (EUXM) Redmi Note 12S?

Cross-region flashing is typically done for niche reasons (like region feature differences), but the safest approach for stability and predictable OTAs is staying on your original branch.

Q4. Why are there multiple “same-day” builds (2025-11-07) for RU/EEA/TW/TR?

Xiaomi publishes separate regional branches for the same device codename, so multiple fastboot builds can be released on the same date with different branch codes.

Q5. What is the difference between “Recovery” and “Fastboot” packages for the same version?

ROM trackers list both Recovery (OTA-style ZIP) and Fastboot (MiFlash.tgz) packages for the same version, and your links are the Fastboot packages.

Q6. What is twrp3.7_sea.zip, and do I need it to flash stock HyperOS?

You don’t need it for stock fastboot flashing; it’s a custom recovery tool meant for advanced modding workflows rather than official ROM restoration.

Redmi Note 12S (sea) HyperOS 2 Fastboot ROMs (A15) Flash File

Redmi Note 12S is a popular budget Redmi Note model, and owners usually care most about smooth performance, stable battery life, and “no-surprises” day-to-day reliability.

After Android 15-based HyperOS 2 updates, common complaints across Xiaomi users include faster battery drain and heating (sometimes even during charging), which often points to a messy OTA upgrade state or background services going wild.

The official fastboot firmware builds below (codename sea) let you clean-flash the correct region ROM—often the fastest path to stability when an update feels worse than before.

Download Firmware for Redmi Note 12S

Filename	Region/Variant	Build Number	Build Date	Android Version	Flashing Method	Notes	File Size	MD5 (Integrity)	Download
`sea_ru_global_images_OS2.0.207.0.VHZRUXM_20251107.0000.00_15.0_ru_173c8d2eb8.tgz`	Russia (RUXM)	`OS2.0.207.0.VHZRUXM`	2025-11-07	Android 15	Xiaomi Flash Tool (Fastboot.tgz)	Newest RU fastboot in your set; choose only if your phone is originally RUXM.	6.63GB (your listing) / 7.1GB (tracker)	`173c8d2eb8c3ad99f4b7c1b4ee750f86`	Download From Xiaomi BigOTA
`sea_eea_global_images_OS2.0.206.0.VHZEUXM_20251107.0000.00_15.0_eea_297c08fa54.tgz`	Europe/EEA (EUXM)	`OS2.0.206.0.VHZEUXM`	2025-11-07	Android 15	Xiaomi Flash Tool (Fastboot.tgz)	Best choice for EU/EEA retail phones that shipped on EUXM; helps keep OTA and regional configs consistent.	6.14GB (your listing) / 6.6GB (tracker)	`297c08fa545a634e918ea57140d22466`	Download From Xiaomi BigOTA
`sea_tw_global_images_OS2.0.207.0.VHZTWXM_20251107.0000.00_15.0_tw_468c4be6a1.tgz`	Taiwan (TWXM)	`OS2.0.207.0.VHZTWXM`	2025-11-07	Android 15	Xiaomi Flash Tool (Fastboot.tgz)	Choose only for TWXM devices; cross-region flashing is a common source of network/OTA weirdness.	5.63GB (your listing) / 6.1GB (tracker)	`468c4be6a1d320774cf86c18534d019a`	Download From Xiaomi BigOTA
`sea_tr_global_images_OS2.0.206.0.VHZTRXM_20251107.0000.00_15.0_tr_6e24c0d673.tgz`	Turkey (TRXM)	`OS2.0.206.0.VHZTRXM`	2025-11-07	Android 15	Xiaomi Flash Tool (Fastboot.tgz)	Correct pick for Turkey variants; it’s region-locked by branch (TRXM).	5.95GB (your listing) / 6.4GB (tracker)	`6e24c0d67307a88e392d13117dbb98a2`	Download From Xiaomi BigOTA
`sea_global_images_OS2.0.207.0.VHZMIXM_20251031.0000.00_15.0_global_c73b48b0b4.tgz`	Global (MIXM)	`OS2.0.207.0.VHZMIXM`	2025-10-31	Android 15	Xiaomi Flash Tool (Fastboot.tgz)	Recommended for most non-EU international devices that shipped with Global ROM; clean flashing is commonly used when HyperOS 2 brings heat/drain regressions.	6.45GB (your listing) / 6.9GB (tracker)	`c73b48b0b4954eaa315d61d04ef23f66`	Download From Xiaomi BigOTA
`twrp3.7_sea.zip`	Custom recovery (unofficial)	N/A	N/A	N/A	Advanced (bootloader/custom recovery workflow)	This is not stock firmware; it’s a recovery tool typically used for advanced tasks (custom ROMs, root). Don’t use it for normal “return to stock” flashing.	47MB	N/A	Download From Google Drive

Best rule: Match the last 4 letters of your current build (MIXM/EUXM/RUXM/TWXM/TRXM) to avoid OTA breaks and modem/network surprises.
Why sizes differ: Your “GB” display can differ from tracker sizes due to rounding and GB vs GiB conventions; MD5 is the reliable integrity check.

Complete Device & Firmware Overview

Phone model: Redmi Note 12S
Codename: sea
Firmware type: HyperOS 2 Stable Fastboot ROM (.tgz)
Android version: Android 15 (all listed OS2.* fastboot builds here)
Build numbers (this post): OS2.0.207.0.VHZMIXM, OS2.0.206.0.VHZEUXM, OS2.0.207.0.VHZRUXM, OS2.0.207.0.VHZTWXM, OS2.0.206.0.VHZTRXM
Release dates (Fastboot): Global: 2025-10-31; RU/EEA/TW/TR: 2025-11-07
MD5 verification: MD5 values for each listed fastboot package are published by ROM trackers and are included in the table above.
Flash method: Xiaomi Flash Tool (fastboot flashing on Windows)
Required tools: Windows PC, Xiaomi USB drivers, Xiaomi Flash Tool, reliable USB cable.
Common reasons to flash: Battery drain/overheating after HyperOS 2 updates, or unstable behavior after an OTA upgrade.
Optional advanced file: twrp3.7_sea.zip is a custom recovery package (not official firmware) for advanced users.

CRUCIAL WARNING: Flash only ROMs made for Redmi Note 12S codename sea and the correct region branch (MIXM/EUXM/RUXM/TWXM/TRXM). Wrong region/codename or a corrupted file can cause bootloops, lost network, or a hard brick—verify MD5 before flashing.

Preparation Before Flashing

Click here for the Redmi Note 12S (sea) pre-flash checklist

Confirm your branch: In Settings → About phone, note whether your version ends with MIXM/EUXM/RUXM/TWXM/TRXM, then download that exact branch.
Back up your data: A clean flash is often the best fix for post-update battery drain/heat, but it can wipe apps and storage depending on the flash option selected.
Verify file integrity: Compare your downloaded file checksum to the MD5 listed for the same package name (table above) to avoid “corrupted ROM” flash failures.
Use stable power + cable: Charge to 50%+ and avoid USB hubs; disconnections mid-flash are a common cause of failed boots.
Don’t mix tools: Use fastboot ROMs with Xiaomi Flash Tool; do not treat the TWRP ZIP as stock firmware.

How to flash Firmware Files to Redmi Note 12S

This simplified guide covers flashing any listed fastboot ROM (for example, sea_global_images_OS2.0.207.0.VHZMIXM_20251031.0000.00_15.0_global_c73b48b0b4.tgz) using Xiaomi’s fastboot flashing workflow on a Windows PC.

Pick the right ROM: Choose the newest build that matches your region branch (MIXM/EUXM/RUXM/TWXM/TRXM).
Download + verify: Download the .tgz and verify its MD5 against the value published for that exact package.
Extract ROM: Extract the .tgz to a short folder path on your PC (to avoid tool path errors).
Flash in MiFlash: Boot the phone into fastboot mode, connect USB, select the extracted ROM folder, and run the flash.
First boot: After flashing Android 15, the first boot can take longer while the system optimizes—wait before judging performance.

For a comprehensive, screenshot-based walkthrough of Xiaomi fastboot flashing (drivers, connection errors, and the safest MiFlash options), follow the main Xiaomi Flash tool guide.

Frequently Asked Questions (FAQs)

Q1. What device is codename sea?: Official ROM trackers list sea as Redmi Note 12S, and the fastboot package names above are explicitly labeled for that codename.
Q2. Which ROM should I download to fix HyperOS 2 battery drain on Redmi Note 12S?: Use the newest fastboot ROM that matches your original branch (for example MIXM for Global or EUXM for EEA), because battery drain/heating issues are commonly reported after HyperOS 2 updates and a clean, matching flash is the safest reset.
Q3. Can I flash Global (MIXM) on an EEA (EUXM) Redmi Note 12S?: Cross-region flashing is typically done for niche reasons (like region feature differences), but the safest approach for stability and predictable OTAs is staying on your original branch.
Q4. Why are there multiple “same-day” builds (2025-11-07) for RU/EEA/TW/TR?: Xiaomi publishes separate regional branches for the same device codename, so multiple fastboot builds can be released on the same date with different branch codes.
Q5. What is the difference between “Recovery” and “Fastboot” packages for the same version?: ROM trackers list both Recovery (OTA-style ZIP) and Fastboot (MiFlash.tgz) packages for the same version, and your links are the Fastboot packages.
Q6. What is twrp3.7_sea.zip, and do I need it to flash stock HyperOS?: You don’t need it for stock fastboot flashing; it’s a custom recovery tool meant for advanced modding workflows rather than official ROM restoration.