If you're facing issues with your C7100's IMEI, I recommend:

Yes, if you use the correct original IMEI and proper tools. Using random IMEIs or generator tools can lead to permanent network bans.

: Once the patch is applied, the device will reboot. Verify the status by dialing and checking the "IMEI Status" in the service menu ( 3. Troubleshooting & Safety Invalid IMEI/NV Data

Elias watched him walk out into the rain, then turned back to his bench. In the world of repair, most saw circuits and solder; Elias saw the threads that kept people connected.

If you are still stuck after trying these steps, consult XDA-Developers forums or a professional phone repair technician. Your C7100 is a resilient device—with the right tools, its IMEI can always be brought back from the void.

Professional tools such as Z3X , Chimera , or Octoplus are the gold standards. Some technicians even use free scripts or SN Writer for MediaTek-based variants.