The Realme C30 is a budget-friendly smartphone that runs on Android 11 out of the box. While it has received positive reviews for its performance and features, some users may want to explore custom ROMs to enhance their device's capabilities, fix bugs, or simply to try out new features. In this paper, we'll discuss the process of installing a custom ROM on the Realme C30, popular custom ROM options, and the benefits and risks associated with customizing your device.