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Before any custom ROM can be installed, the bootloader must be unlocked. For the Nokia G300, this was restrictive: unlocking was only possible on firmware version 02US_1_10M (or older). Attempting to unlock on newer versions (like 02US_1_160 ) could permanently "hard brick" the device. The main unlocking methods included: nokia g300 custom rom 2021
The device surfaced with the codename "Aoki". Developers often need this, along with specific kernel sources, to create ROMs like LineageOS or Pixel Experience. In 2021, these sources were not widely available. 2021 Alternative: GSI (Generic System Image) : Before any custom ROM can be installed,