If Maui META fails (common on newer security patches), you cannot repair it via free software. Realme started enforcing SBC (Secure Boot Chain) on the C30 firmware.
Obtain an unlock code from authorized services or the Realme Network Unlock App . realme c30 imei repair unlock tool
The official flash tool. While it doesn't "repair" IMEIs directly, it is necessary to flash the correct NVRAM/NV-data files if your IMEI shows as "Unknown" or "Null." How the Repair Process Works If Maui META fails (common on newer security
Struggling with invalid or null IMEI on your Realme C30? Discover the best IMEI repair tools, unlock methods, and critical legal advice to restore network connectivity permanently. The official flash tool
Generic Repair IMEI (patch) on MediaTek devices with ChimeraTool
If you want, I can draft a polite message you can send to Realme support or your carrier requesting help—tell me which and any specifics (purchase date, IMEI shown, carrier).
Here are a few considerations: