The Poco C55 and Redmi 12C (codenamed "earth") are essentially the same device under the hood, sharing the MediaTek Helio G85 chipset. A common issue for power users and technicians working with these devices is the "NV Data is Corrupted" error, often occurring after a failed flash, IMEI repair attempt, or software downgrade. Understanding NvData and NvRam
The NV (Non-Volatile) partitions are critical for your phone's unique identity and connectivity:
NVRAM: Stores permanent hardware data, including your IMEI numbers, MAC addresses (Wi-Fi/Bluetooth), and baseband calibration.
NVDATA: Contains dynamic network settings and security information that interacts with the NVRAM during boot.
Why they fail: These partitions are unique to every single device. If you flash a "donor" file from another phone without proper patching, the system security check will fail, resulting in a boot loop to Recovery mode with the "NV Data Corrupted" message. How to Fix "NV Data is Corrupted"
If you are stuck in this loop, the goal is to restore the device's ability to read its network identity. 1. The "Clean" Flash Method
Sometimes, the error is caused by a version mismatch between the firmware and the data partitions.
Step: Download the latest official Fastboot ROM for your specific region (e.g., Global, India, or Russia) from trusted sources like XiaomiROM or MiUI Firmware Updater.
Tool: Use the Mi Flash Tool to perform a "Clean All" flash. This may resolve minor software conflicts. 2. Advanced Repair with Professional Tools Poco c55 or Redmi-12c-earth- NvData NvRam File ...
If a standard flash doesn't work, you likely need to repair the NV partitions directly using specialized MTK tools.
Bypass Tool: Since these are MediaTek devices, you often need an MTK Auth Bypass Tool to put the phone into BROM mode (usually by holding both volume buttons while connecting to a PC).
Unlock Tool / Pandora: Technicians frequently use the Unlock Tool to "Wipe NV" or "Fix NV Data".
SP Flash Tool: For manual partition flashing, you can use SP Flash Tool with a scatter file from the official firmware to flash specific images like md1img.img or donor NV files, though donor files often require further IMEI repair to function correctly. Where to Find Files
Official Firmware: Essential for extracting the scatter file and standard partition images.
Donor NV Files: While risky, some community-shared donor files for Redmi 12C (earth) can be found on sites like AndroidFileHost for testing purposes.
Community Support: The 4PDA POCO C55 / Redmi 12C thread is a primary hub for specialized "fix" instructions and custom recovery links. Important Warning
Always backup your own NVRAM/NVDATA before attempting any software modifications. If you lose your original NV files and don't have a backup, restoring your original IMEI and cellular connectivity becomes significantly more difficult and may require professional hardware service. POCO C55 / Redmi 12C - Прошивки - 4PDA The Poco C55 and Redmi 12C (codenamed "earth"
(codenamed ) share identical hardware, and issues with typically result in critical errors like "NV Data is corrupted," bootloops, or lost IMEI/network signals
. These files contain device-specific calibration data and unique identifiers that are not included in standard firmware updates. Understanding NVData and NVRam NVRAM (Non-Volatile RAM):
Stores permanent data like the IMEI number, MAC addresses (Wi-Fi/Bluetooth), and baseband versions.
A secure partition that works with NVRAM to store network-related calibration and security data. If this partition fails, the device will often display the "NV Data is corrupted" message on the recovery screen. How to Fix "NV Data is Corrupted"
Because these files are unique to every individual handset, simply flashing a file from another phone may not always restore the IMEI, though it can help the device boot. Method 1: Using Hydra or Unlock Tool (Recommended)
This is the most common professional method for the "earth" platform. Use a tool like Super Hydra Unlock Tool to erase the existing partitions. Write Backup:
Write working NV files from a known good backup. Note that the device may still show "corrupted" after this step until the firmware matches. Downgrade Firmware: Flash the device with a compatible Downgrade Firmware (e.g., MIUI V13.0.4.0). You
select "Format" or "Clean All" before flashing to reset the partition table. Repair IMEI: Lost IMEI after flashing (shows “invalid IMEI” or
Once the device boots, use the tool's "Repair IMEI" or "Patch NVData" function to restore your original IDs. Method 2: Manual Restore via SP Flash Tool For those without professional dongles, the SP Flash Tool can be used. Scatter File: Load the firmware's scatter file. Manual Flash: Manually select the partitions and point them to your backup files. Auth Bypass:
Because these are MediaTek (MTK) devices, you will likely need an MTK Auth Bypass tool to allow the SP Flash Tool to communicate with the phone in BROM mode. Important Resources POCO C55 / Redmi 12C - Прошивки - 4PDA
To write an essay about the "Poco C55 or Redmi 12C Earth NVData NvRam File," we first need to understand what each component refers to and then compare or discuss them accordingly.
Common scenarios:
No — not directly.
Even though the board is the same, the partition signatures are tied to:
ro.product.model)If you flash Redmi 12C’s nvram onto a Poco C55, you might get:
Solution: Extract only the calibration region from Redmi 12C’s nvram and patch into Poco’s nvram with hex editor (advanced users only).
Prevention is better than cure. If you use SP Flash Tool on your earth device:
nvram, nvdata, protect1, and protect2 partitions if manually flashing a scatter file.If you use Mi Flash Tool (Fastboot mode), always select save user data or clean all – never clean all and lock without a backup.
nvram.bin and nvdata.bin.