Installing a custom ROM on your Nokia G300 requires some technical expertise and caution. Here's a step-by-step guide to help you get started:
(released October 2021) has virtually no official or stable custom ROM support. Like most HMD Global Nokia devices, the G300 is notorious for having a without an official method to unlock it, which is the primary barrier to custom ROM development. The State of Development (2021–Present) nokia g300 custom rom 2021
The Nokia G300 (and most modern Nokia devices) comes with a locked bootloader that cannot be officially unlocked . Without an unlocked bootloader, you cannot flash custom recovery (like TWRP) or custom ROMs. Installing a custom ROM on your Nokia G300