Nokia G300 Custom Rom

Step 1: Boot into Fastboot Power off your Nokia G300. Hold Volume Down + Power until you see the fastboot screen (a small Android robot).

Step 2: Erase Old Data Open command prompt on your PC and type:

fastboot erase userdata
fastboot erase cache
fastboot format system

Step 3: Disable Verity (Critical) If you skip this, the phone will bootloop. Flash the empty vbmeta:

fastboot flash vbmeta vbmeta.img --disable-verity --disable-verification

Step 4: Flash the ROM For GSI ROMs:

fastboot flash system your_rom_name.img

For recovery-flashable ROMs (ZIP files), you must first flash a custom recovery like TWRP (if ported to G300). nokia g300 custom rom

Step 5: Reboot

fastboot reboot

Wait. The first boot takes 5–10 minutes. If you see a "Device corrupt" boot message, ignore it—that is normal for unlocked Nokia devices.

Despite the device being released in 2021, the development scene is extremely small.

This post explains why enthusiasts install custom ROMs on the Nokia G300, what to expect, and a step‑by‑step installation walkthrough with safety tips and recommended ROMs. Step 1: Boot into Fastboot Power off your Nokia G300

First, let’s set realistic expectations. The Nokia G300 (codenamed DRG or Snapdragon 480 variant) is not a developer-friendly device like a OnePlus or a Pixel. HMD Global has a history of locking bootloaders tight, and the G300 is no exception.

As of 2025, here is the landscape:

The Big Warning: Before you search for "Nokia G300 Custom ROM download," you must understand that there is no official LineageOS, Pixel Experience, or crDroid build for this device yet. However, there are modified stock ROMs (debloated) and early GSI (Generic System Image) builds that may work.

Disclaimer: This guide is for educational purposes. Neither the author nor the website is responsible for bricked devices. Back up your data via adb backup first. Step 3: Disable Verity (Critical) If you skip

No – strongly not recommended.

For the same price range (~$150 used), if you want custom ROMs, buy a OnePlus Nord N200 (decent custom ROM support) or a Moto G Power (2021) (unlockable bootloader + LineageOS).

Most Nokia G300 units in North America are locked to T-Mobile or Metro. These carriers pre-install applications that run in the background, consume RAM, and drain your battery. A custom ROM provides a clean, AOSP (Android Open Source Project) experience without a single carrier app in sight.