The codename earth is shared between the Redmi 12C and Poco C55. Internally, they are identical. This means:
However, here lies the critical warning: You cannot download a working NVData file from a forum (4pda, XDA, GSM-Forum) and flash it to your device.
Why? Because every physical phone has a unique set of calibration data. If you flash someone else's NVData:
| 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. Poco c55 or Redmi-12c-earth- NvData NvRam File ...
Not possible — NVRAM is not accessible via fastboot on MediaTek.
The Xiaomi Poco C55 and its identical sibling, the Redmi 12C (codename: earth), are budget powerhouses running on the MediaTek Helio G85 chipset. These devices are popular in developing markets due to their low cost and solid performance. However, like all MediaTek-based Android phones, they are susceptible to a specific type of software corruption: NVData and NVRam corruption.
If you have landed on this page searching for "Poco C55 or Redmi-12c-earth- NvData NvRam File", you are likely staring at a phone that:
This article will explain what these partitions are, why using a generic "downloaded" file is dangerous, and how to legitimately fix your device. The codename earth is shared between the Redmi
When you “develop a proper feature” for the file content, you need the NvRam region layout correctly mapped:
| NvRam Region | Feature Provided |
|--------------|------------------|
| RF_Cal (0x100–0x2000) | Restores RX/TX gain, frequency response, antenna tuning. |
| IMEI1 / IMEI2 storage | Two 15-digit slots + checksum. |
| MAC_WLAN | 6-byte Wi-Fi MAC address. |
| MAC_BT | 6-byte Bluetooth MAC address. |
| SN_Number | Device serial number string. |
| Security_Zone | DRM keys (Widevine L1 – if originally present). |
| Barcode_Data | Shows correct IMEI in dialer *#06#. |
⚠️ DRM/Widevine keys cannot be restored from another device – they are unique per unit.
If you are actually creating such a file pack and need help generating a clean NvRam binary with default calibration (no IMEI), let me know – I can outline the exact offsets and bytes for MediaTek Helio G85 on these devices. However, here lies the critical warning: You cannot
| Feature | Description |
|---------|-------------|
| Restore baseband | Fix “unknown baseband” or “no service” after flashing corrupt firmware. |
| Repair IMEI | Restore original IMEI numbers (requires writing with tools like Maui META or SN Writer). |
| Fix Wi-Fi/Bluetooth MAC | Restore original MAC addresses stored in NvRam. |
| Recover calibration data | Restore RF (radio frequency) calibration values for proper network reception. |
| Unbrick after wrong format | Fix devices where nvdata or nvram was erased via SP Flash Tool “format all + download”. |
| Convert between Poco C55 ↔ Redmi 12C | Allows rebranding without losing network functionality (requires proper IMEI rewrite afterward). |
Searching for "Poco c55 or Redmi-12c-earth- NvData NvRam File download" will lead you to:
The truth: A generic "earth" NVData file does exist for flashing dead phones, but it is a blank NVRam file. It will restore the partition structure but set all IMEIs to "0" or "N/A." You still need a tool like Maui META or SN Write Tool to inject your own IMEI.
If you download a file claiming to have working IMEIs, it is either: