(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:
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
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. Poco c55 or Redmi-12c-earth- NvData NvRam File ...
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
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 (codenamed ) share identical hardware, and issues with
Go to product viewer dialog for this item. (both using the codename ), NVData and NVRam files are
critical system components that store unique hardware identifiers such as IMEI numbers , Wi-Fi MAC addresses, and radio frequency parameters
. When these files become corrupted—often during flashing or software updates—users encounter the "NV Data is Corrupted" error, which typically leads to a boot loop or a total loss of network services. Google Patents Core Concepts NVRAM (Non-Volatile RAM):
Stores persistent data that survives a power-off, including the device's unique IMEI and baseband information.
A specific partition on Xiaomi devices that holds configuration data related to the modem and network. Codename "earth":
share this internal Xiaomi codename, meaning they often use the same firmware and repair files Common Causes of Corruption Interrupted Flashing: Power loss or cable disconnection during a firmware update. Incorrect Firmware:
Flashing a ROM that does not match the device's specific region or hardware variant. Formatting Partitions:
Accidentally selecting "Format All + Download" in tools like SP Flash Tool, which wipes the NV partitions. Standard Repair Process
Fixing these issues generally requires specialized software tools like Unlock Tool Hydra Tool . The typical workflow includes:
You're looking for information on the Poco C55 or Redmi 12C, specifically related to NV data, NV RAM files, and possibly unbricking or fixing issues with these devices.
The Poco C55 and Redmi 12C are both budget-friendly smartphones from Xiaomi's sub-brands. While they share some similarities, they are distinct devices with different specifications.
Poco C55
Redmi 12C
Regarding NV data and NV RAM files:
If you're experiencing issues with your Poco C55 or Redmi 12C, such as bootloops, bricked devices, or forgotten passwords, you might be looking for NV data or NV RAM file solutions to unbrick or fix your device.
Some possible reasons for searching NV data or NV RAM files:
However, I need to clarify that:
If you're experiencing issues with your device, I recommend:
Please provide more details about your specific issue or question, and I'll do my best to help.
You won’t find generic working dumps online because:
Legitimate sources:
| Tool | Use Case |
|------|----------|
| SP Flash Tool | Write nvram.bin and nvdata.bin via “Write Memory” tab or using a scatter file. |
| Maui META Tool | Restore IMEI and MAC after flashing clean NvRam. |
| SN Writer (MediaTek) | Write IMEI + MAC + SN together via USB. |
| MTK Meta Utility | Command-line NvRam read/write. |
| Hex editor (HxD) | Manual IMEI injection into nvram.bin (advanced). |
| Feature | Poco C55 | Redmi 12C |
|--------|----------|------------|
| Model | 22127PC95I (India/Global) | 22120RN86G / 22120RN86I |
| Chipset | MediaTek Helio G85 | MediaTek Helio G85 |
| Board | c55 / earth | earth (same board name) |
| NVData/NVRAM | Critical for IMEI, BT/WiFi MAC, calibration | Same |
Key fact: They use the same base firmware (codename earth for Redmi 12C, sometimes c55 for Poco variant). NVData files are not cross-flashable without hex editing because IMEI region lock and calibration data differ.
To understand the repair process, you must first understand the architecture.
If you have a "dead baseband" on your Poco C55 / Redmi 12C, here is the step-by-step professional workflow. Released in 2022 Features a 6
dd if=/dev/block/by-name/nvram of=/sdcard/nvram.bin
dd if=/dev/block/by-name/nvdata of=/sdcard/nvdata.bin
In conclusion, the Poco C55 and Redmi 12C are solid choices for individuals looking for budget-friendly smartphones with essential features. The significance of NVData and NvRam files in these and other devices cannot be overstated, as they play a critical role in device performance and user experience. Understanding and properly managing these components can help users maintain their devices' optimal functionality.