Xiaomi Redmi 12C and POCO C55, codename earth, are Helio G85-based budget models that ship with Android 13 and have moved to Android 14-based HyperOS in the OS1.x stable branch. On this device family, issues such as bootloops after failed OTAs, soft-bricks from incorrect root procedures, or cross-region configuration problems can often be addressed by flashing the correct HyperOS fastboot ROM for the matching region code (CNXM, MIXM, EUXM, INXM, IDXM, TRXM, TWXM, RUXM).
Redmi 12C / POCO C55 Firmware Details
| Device Name | Redmi 12C / POCO C55 |
|---|---|
| Model Identifier | Redmi 12C / POCO C55 retail variants (for example, 22120RN86G and related regional SKUs) |
| Codename | earth |
| Chipset / Platform | MediaTek MT6768 Helio G85 (octa-core Cortex-A75 + Cortex-A55) |
| Launch Android Version | Android 13 with MIUI for Redmi / POCO skin, upgradable to Android 14-based HyperOS 1.0 |
| Current Firmware Line | HyperOS 1.x stable branch, Android 14, region-coded (CNXM, MIXM, EUXM, INXM, IDXM, TRXM, TWXM, RUXM) |
| Typical File Size Range | Approximately 4.6–6.2 GB for HyperOS fastboot ROMs on this model, depending on region content. |
| Firmware Type | Official HyperOS fastboot ROMs in .tgz archives (images_ packages) |
| Flashing Tool | Mi Flash Tool or included Windows fastboot scripts; advanced users may also use standard fastboot with care. |
| Bootloader Requirement | Unlocked bootloader typically required for fastboot flashing on Xiaomi devices in the HyperOS era. |
| Region / Branch Notes | CN (CNXM) is China-only, MIXM is Global, EUXM is EEA, INXM is India, IDXM is Indonesia, TRXM is Turkey, TWXM is Taiwan, RUXM is Russia; cross-flash behavior can vary and may require a clean flash. |
⚠️ Flashing Risks & Disclaimer
On this Helio G85 Xiaomi series, fastboot ROMs write multiple critical partitions including boot, system, and vendor, so any interruption during flashing (USB disconnect, power loss, or driver crash) can leave the phone in a state that boots only to fastboot or, in some cases, does not respond at all. Anti-rollback and region checks tied to HyperOS builds can also limit downgrades or cross-region moves, so forcing a lower or incompatible OS1.0.x build on earth may cause permanent brick if internal rollback indices or modem compatibility rules are violated.
Cross-flashing between branches like CNXM and MIXM/EUXM is not officially supported and frequently requires a full data wipe, with a risk of network or certification issues if the modem region does not match the hardware SKU. All flashing steps on this page are intended for advanced users who understand bootloader unlocking, Xiaomi account limitations, and data backup, and every action is strictly at the user’s own risk, including potential data loss and warranty impact.
Download Official Firmware for Redmi 12C / POCO C55
The table below lists official HyperOS fastboot ROMs for earth grouped by region, build, and Android version so that users can pick the file that matches both the device SKU and the intended deployment region. The filenames are shown exactly as served from Xiaomi’s bigota / hugeota servers, which helps verify integrity and region codes before flashing.
| Region / Variant | Filename | Build / Version | Android / Firmware | File Type | Build Date | File Size | Download Link |
|---|---|---|---|---|---|---|---|
| China (CNXM) | earth_images_OS1.0.8.0.UCVCNXM_20250820.0000.00_14.0_cn_177386999a.tgz | OS1.0.8.0.UCVCNXM | Android 14 / HyperOS 1.0 (China) | Fastboot ROM (.tgz) |
2025-08-20 (from filename) | 4.62 GB | Download China build (official server) |
| Global (MIXM) | earth_global_images_OS1.0.14.0.UCVMIXM_20251027.0000.00_14.0_global_2567c8a97b.tgz | OS1.0.14.0.UCVMIXM | Android 14 / HyperOS 1.0 (Global) | Fastboot ROM (.tgz) |
2025-10-27 (from filename) | 6.20 GB | Download Global build (official server) |
| Europe EEA (EUXM) | earth_eea_global_images_OS1.0.13.0.UCVEUXM_20251027.0000.00_14.0_eea_ca2745a4ab.tgz | OS1.0.13.0.UCVEUXM | Android 14 / HyperOS 1.0 (EEA) | Fastboot ROM (.tgz) |
2025-10-27 (from filename) | 5.73 GB | Download EEA build (official server) |
| India (INXM) | earth_in_global_images_OS1.0.11.0.UCVINXM_20250624.0000.00_14.0_in_7415d0374a.tgz | OS1.0.11.0.UCVINXM | Android 14 / HyperOS 1.0 (India) | Fastboot ROM (.tgz) |
2025-06-24 (from filename) | 5.07 GB | Download India build (official server) |
| Indonesia (IDXM) | earth_id_global_images_OS1.0.9.0.UCVIDXM_20250624.0000.00_14.0_id_4588d3cc2f.tgz | OS1.0.9.0.UCVIDXM | Android 14 / HyperOS 1.0 (Indonesia) | Fastboot ROM (.tgz) |
2025-06-24 (from filename) | 5.76 GB | Download Indonesia build (official server) |
| Turkey (TRXM) | earth_tr_global_images_OS1.0.9.0.UCVTRXM_20250624.0000.00_14.0_tr_c0717e7204.tgz | OS1.0.9.0.UCVTRXM | Android 14 / HyperOS 1.0 (Turkey) | Fastboot ROM (.tgz) |
2025-06-24 (from filename) | 5.48 GB | Download Turkey build (official server) |
| Taiwan (TWXM) | earth_tw_global_images_OS1.0.9.0.UCVTWXM_20250624.0000.00_14.0_tw_051ff6f1fe.tgz | OS1.0.9.0.UCVTWXM | Android 14 / HyperOS 1.0 (Taiwan) | Fastboot ROM (.tgz) |
2025-06-24 (from filename) | 5.19 GB | Download Taiwan build (official server) |
| Russia (RUXM) | earth_ru_global_images_OS1.0.10.0.UCVRUXM_20250902.0000.00_14.0_ru_59b8b117d0.tgz | OS1.0.10.0.UCVRUXM | Android 14 / HyperOS 1.0 (Russia) | Fastboot ROM (.tgz) |
2025-09-02 (from filename) | 6.07 GB | Download Russia build (official server) |
Flashing Requirements
To flash these HyperOS fastboot ROMs on earth, a Windows PC is strongly recommended, as Mi Flash Tool and Xiaomi’s official fastboot scripts are primarily documented and tested on Windows. The phone should have an unlocked bootloader via Xiaomi’s standard unlock procedure, and Xiaomi USB drivers must be installed so that fastboot mode is detected correctly when the device is connected.
- Download and extract the chosen
.tgzfastboot ROM so the folder exposes theimagesdirectory and Windows batch scripts such asflash_all.batandflash_all_except_storage.bat. - Install Mi Flash Tool or rely on the packaged fastboot scripts; both approaches use the same underlying fastboot protocol for this device family.
- Ensure the bootloader is unlocked on the Redmi 12C / POCO C55 and OEM unlocking is allowed in developer options before attempting a flash.
- Back up user data, as
flash_alland similar options perform a clean flash that wipes data and, in some cases, may also reformat internal storage. - Verify that the region suffix in the build (MIXM, EUXM, INXM, IDXM, TRXM, TWXM, RUXM, CNXM) matches the intended target configuration to minimize issues with OTA updates and regional services.
How to Flash the Firmware
- Download the correct HyperOS fastboot ROM for earth (for example, OS1.0.14.0.UCVMIXM if targeting the Global branch), then extract the
.tgzfile until the folder containingflash_all.batand theimagesdirectory is visible. - Install Mi Flash Tool on a Windows PC, or prepare to use the packaged Windows fastboot script, and confirm Xiaomi USB drivers are installed so the tool can see devices in fastboot mode.
- Power off the phone and enter fastboot mode by holding Volume Down + Power, then connect the Redmi 12C / POCO C55 to the PC via USB and check that fastboot or Mi Flash lists the device ID.
- In Mi Flash, select the extracted ROM folder, choose the desired option (for example,
clean allwhich matchesflash_allbehavior), or run the relevant script manually, then start the flashing process and wait for it to complete without interruption. - Once the tool or script reports success, allow the phone to reboot; first boot into HyperOS after a full flash can take several minutes as Android 14 rebuilds caches and optimizes applications on this Helio G85 platform.
For a visual walkthrough of Mi Flash usage with Xiaomi fastboot ROMs, see detailed community and vendor-aligned guides that show driver installation, fastboot entry, ROM selection, and script options for HyperOS Xiaomi devices.
Frequently Asked Questions (FAQs)
Which builds are safe for a Redmi 12C bought in Europe?
For a retail EEA Redmi 12C, HyperOS fastboot ROMs with the EUXM suffix (such as OS1.0.13.0.UCVEUXM) are the intended regional branch; cross-flashing to MIXM or other regions may work but is not guaranteed and usually requires a clean flash.
Can a POCO C55 use the same earth fastboot ROMs as Redmi 12C?
Yes, both Redmi 12C and POCO C55 share the earth codename, so HyperOS fastboot ROMs for this codename are common, but region and carrier differences should still be respected.
Is it possible to switch from China (CNXM) to Global (MIXM) on this model?
Some users move from CNXM to MIXM using fastboot ROMs and a full wipe, but this is not officially supported and can affect network compatibility, safety checks, and future OTA behavior on earth.
Do these HyperOS fastboot ROMs support downgrading within OS1.0.x?
Downgrades between OS1.0.x builds may be restricted by anti-rollback settings; flashing a fastboot ROM with a lower rollback index than the currently installed build can permanently brick the device.
Why are some region packages larger than others?
Global and Russia packages (MIXM, RUXM) tend to be larger (around or above 6 GB) because they often bundle more language packs, Google services, and regional apps than leaner branches like CNXM.
Will flashing these ROMs relock the bootloader on Redmi 12C / POCO C55?
Standard HyperOS fastboot ROMs for earth do not usually relock the bootloader unless a specific relock option or script is used, but behavior can vary across Xiaomi generations and should be confirmed before flashing.
Can Mi Flash Tool errors be recovered from on this Helio G85 device?
Many Mi Flash errors relate to drivers, cable issues, or mismatched partitions; as long as fastboot mode is still accessible on the Helio G85 platform, the device can often be recovered by correcting the issue and reflashing the correct ROM.
Will using a fastboot ROM improve performance compared to OTA updates?
A clean HyperOS fastboot flash can sometimes reduce residual issues left by multiple OTAs on this series, but performance changes depend on the specific build and installed apps rather than the flashing method alone.
