Back on the PC, the command returned: MT6765VCA... device
He tried the standard command anyway. The terminal replied: FAILED (remote: 'Unlock operation is not allowed')
Before even touching the phone, Marcus opened his laptop. He knew the first rule of phone modding: Unlocking the bootloader wipes everything. Not a factory reset—a complete, irreversible data shred.
He backed up his photos to Google Drive, exported his contacts, and copied his music to an external SSD. He triple-checked. Once the process started, the phone would become a blank slate. How to Open Bootloader Mode on NOKIA G20
He wanted to install a custom ROM, remove bloatware, or perhaps root the device for advanced automation. But there was a gatekeeper: the . The bootloader is the first program that runs when you press the power button. It tells the phone, "Load the operating system." In its locked state, it checks for official signatures, refusing to run anything not approved by HMD Global (Nokia's manufacturer).
The Gatekeeper’s Key: Unlocking the Bootloader on the Nokia G20
Marcus stared at his Nokia G20. It was a good phone—solid, durable, with a battery that seemed to last forever. But to Marcus, a tinkerer at heart, it felt like a beautiful house where the landlord had locked the basement, the attic, and all the tool sheds. Back on the PC, the command returned: MT6765VCA
Some devices require a leaked engineering bootloader. Others exploit a vulnerability. But for the G20 (MediaTek Helio G35 chipset), the security was tight. There were shady "paid unlocking services" that asked for remote access to his PC—a red flag the size of a skyscraper. He refused.
To do what Marcus wanted, he needed to unlock this gatekeeper. This is the story of how he did it.
They were talking.
Marcus didn't unlock his Nokia G20 that day. Instead, he learned to appreciate the phone for what it was: a secure, reliable daily driver. He focused on what he could do without unlocking—using Shizuku for some ADB commands, installing a lightweight launcher, and disabling bloatware via ADB without root.
On his laptop, he opened a command prompt in the Platform Tools folder and typed:
He then rebooted the phone into the bootloader mode using: He knew the first rule of phone modding: