The C7100 is commonly a rugged enterprise PDA used for inventory, logistics, and field data collection. Like all cellular devices, it has a unique International Mobile Equipment Identity (IMEI) number. IMEI corruption can occur after:
When IMEI becomes invalid (e.g., 000000000000000 or null) or mismatched, the device may fail to register on mobile networks, make calls, or use 4G data.
For advanced users with Magisk or SuperSU access, you can manually edit the NVRAM file. This is a software-only fix that does not require a PC.
Note: This is risky. A single wrong hex value can corrupt the entire NVRAM. c7100 imei repair
Do not rush. IMEI repair requires focus. Gather the following:
IMEI repair often involves flashing or formatting partitions. Back up your contacts, photos, and documents. A full NVRAM backup (using tools like Miracle Box) is highly recommended.
Success: A green circle will appear with "PASS." Disconnect the phone and reboot it. The C7100 is commonly a rugged enterprise PDA
Locate the original IMEI(s):
You will need both IMEI1 and IMEI2 (for dual-SIM models) in decimal format (e.g., 123456789012345).
| Error Code | Meaning | Solution |
| :--- | :--- | :--- |
| S_BROM_CMD_FAIL (0x1313) | USB disconnection during preloader | Swap USB ports. Use USB 2.0, not 3.0. Install VCOM drivers again. |
| S_FT_ENABLE_DRAM_FAIL | Incompatible scatter file | Find the exact stock ROM for your C7100 revision. |
| SN Write Tool Stops at 20% | Wrong MDDB file | Extract the MDDB directly from your phone’s etc/mddb/ via ADB. |
| IMEI shows "Invalid" after repair | Checksum mismatch | Re-run SN Writer with "Checksum" disabled, or flash full stock ROM first. | When IMEI becomes invalid (e
The C7100 may come in two variants:
How to check: Install CPU-Z or Device Info HW from the Play Store. Look for "Processor" or "Chipset."