Works about 30% of the time. The issue is that newer security patches (Android 12/13 Go on the C30s) have locked META mode. The phone often rejects writes with "SECURITY: IMEI protection enabled." Free tools rarely bypass this. Most users will hit a wall here.
Before proceeding, a crucial disclaimer: (printed on the box or under the battery). Changing an IMEI to bypass a blacklist or hide a stolen phone is a serious crime in most countries (punishable by fines or imprisonment). This review assumes you own the device and are restoring its legitimate, factory IMEI. realme c30s imei repair
If you have already rooted your Realme C30s, IMEI repair becomes trivial. However, rooting voids the warranty. Works about 30% of the time
The IMEI numbers will persist until another full firmware flash. This method works immediately if the baseband is functional. Most users will hit a wall here