Zenfone 9 Unlock Bootloader

Your phone is now a blank slate. Here’s the typical next steps for a Zenfone 9 user:

The phone will reboot. It may stay on the Asus logo for a few minutes—this is normal as it is wiping the data partition.

Once the phone boots up:

Abstract: The Asus Zenfone 9 represents a rare bastion for enthusiast users in a smartphone market increasingly hostile to system-level modifications. This paper examines the bootloader unlocking process for the Zenfone 9, not merely as a series of fastboot commands, but as a nexus of hardware security (AVB, dm-verity), supply chain trust, warranty jurisprudence, and post-market firmware freedom. We dissect the official unlocking mechanism, its irreversible eFuse trigger, and the subsequent impact on SafetyNet, Widevine L1, and persistent diagnostic states. Finally, we contrast Asus’s approach with competitors, arguing that the Zenfone 9 occupies a unique—and perhaps terminal—position as a "developer's last compact flagship."

Unlocking the bootloader will:

Proceed only if you understand the risks.

The Zenfone 9 is one of the last unlockable compact flagships, but ASUS has made the process deliberately painful with permanent DRM degradation. It's possible, but you'll pay a high media/security feature price.

As of April 2026, it is currently not possible to unlock the bootloader of the ASUS Zenfone 9 Go to product viewer dialog for this item.

using official methods. While the device was originally advertised with this feature, ASUS has disabled the necessary tools and servers. ⚠️ Current Status: Official Tool Disabled

ASUS previously provided an Unlock Device Tool (an APK file) that communicated with their servers to authorize unlocking.

Tool Removal: ASUS removed this tool from its website and shut down the backend servers around late 2023.

Failed Promises: Despite repeated official statements in 2023 and 2024 that the tool was undergoing "maintenance" and would return, it remains unavailable.

Company Stance: Internal communications leaked to users suggest that ASUS has decided to stop supporting bootloader unlocking for all current and future devices. 🚫 Unofficial Workarounds and Risks

Users have attempted several unofficial methods, but ASUS has actively moved to block them: zenfone 9 unlock bootloader

Firmware Blocks: Recent security updates (e.g., version 33.0804.2060.189) explicitly disable unofficial unlock exploits.

Anti-Rollback: These updates often prevent users from downgrading to older, vulnerable firmware versions.

Web Endpoint Shutdown: ASUS disabled the specific web endpoints (dm.asus.com) used by community-developed scripts to register devices for unlocking. 💡 Key Implications

Unlocking the bootloader on the ASUS Zenfone 9 Go to product viewer dialog for this item.

has shifted from a standard manufacturer-supported feature to a complex and controversial issue. While ASUS initially provided an official tool for this purpose, they have since revoked access

and disabled the necessary servers, effectively ending official support for bootloader unlocking on this device. The Current Status of Unlocking Official Tool Shutdown

: In August 2023, ASUS removed the official unlocking tool from their website and shut down the servers required to generate the unlock keys. Official Stance

: ASUS support has stated to various users that unlocking the bootloader is no longer possible for the and Zenfone 10 Security & Policy Shifts

: ASUS cited reasons ranging from "security vulnerabilities" to "regulatory requirements" for this change, though these claims have been met with skepticism by the developer community. Historical Context Initial Support

: At launch in August 2022, ASUS released both the bootloader unlock tool and kernel source code, marketing the as a developer-friendly device Community Fallout

: The sudden removal of the tool led to significant backlash. One user in the UK successfully sued ASUS in small claims court for a refund because the "promised" feature was no longer available. Unofficial Methods

: While some unofficial methods appeared briefly on forums like XDA, ASUS reportedly released firmware updates (e.g., version 33.0804.2060.189) specifically designed to block these workarounds and prevent firmware downgrading. Risks and Considerations

Unable to unlock Bootloader on Zenfone 9 and Zenfo... - ASUS 8 Nov 2023 — Your phone is now a blank slate

The story of unlocking the bootloader on the ASUS Zenfone 9 is a cautionary tale of a once "enthusiast-friendly" brand shifting toward a closed ecosystem. It transitioned from a simple, free software process to a controversial, paid service. The Era of the Official Unlock Tool

In its prime, the Zenfone 9 was a darling for the custom ROM community. ASUS provided an official Bootloader Unlock App (an APK) directly on their support website.

The Process: Users would download the app, agree to void their warranty, and the tool would communicate with ASUS servers to generate a unique unlock key for that specific hardware.

The Benefit: This allowed for root access, custom recoveries like TWRP, and operating systems like LineageOS. The "Maintenance" Shutdown (May 2023)

The narrative shifted in May 2023 when ASUS pulled the unlock tool from its servers, citing "server maintenance."

The Promise: ASUS representatives initially claimed the service would return in Q3 2023.

The Reality: The servers never came back online for the public. Users who bought the Zenfone 9 specifically for its modding potential found themselves "locked out" of their own devices. The Shift to a Paid Service (Current State)

As of late 2024 and 2025, the story took a turn that sparked significant backlash in the community.

The New Policy: Instead of a free app, reports surfaced that ASUS began offering a bootloader unlocking service as a paid "repair" option.

The Cost: Users in regions like Europe were quoted approximately €185 (~$200 USD) to have their bootloader officially unlocked by an ASUS service center.

The Limitation: This physical shipping and payment requirement has effectively ended the era of "at-home" modding for the Zenfone 9, unless a user relies on rare, unofficial exploits that often compromise security. Risks and Precautions

If you do manage to unlock the device, be aware of the following:

Data Wipe: Unlocking the bootloader triggers a mandatory factory reset. Abstract: The Asus Zenfone 9 represents a rare

Security Loss: Features like Google Pay/Wallet (Widevine L1) may break, and the device becomes more vulnerable to unauthorized firmware.

Warranty: Unlocking officially voids the manufacturer's warranty for any software-related issues.

The Quest for Customization

I had just unwrapped my brand new Zenfone 9, and I was excited to explore its features. As a tech enthusiast, I loved the idea of customizing my device to its full potential. But, I knew that to do that, I needed to unlock the bootloader.

I had heard that unlocking the bootloader could be a complex process, but I was determined to take on the challenge. I began by searching online for tutorials and guides specific to the Zenfone 9. After hours of research, I stumbled upon a reliable forum thread that outlined the steps.

The process required me to enable Developer Options on my device, which I did by going to Settings > About phone > Build number and tapping on it seven times. Then, I had to enable OEM Unlocking by going to Settings > Developer Options > OEM Unlocking and toggling it on.

Next, I had to install the Android Debug Bridge (ADB) on my computer and connect my Zenfone 9 to it via USB. I followed the commands to boot my device into Fastboot mode, where I would be able to unlock the bootloader.

The moment of truth had arrived. I typed in the command fastboot oem unlock and waited for the response. The device screen flickered, and a warning message appeared, cautioning me about the risks of unlocking the bootloader. I carefully read through the message and confirmed that I wanted to proceed.

The device then prompted me to enter a code, which I had to obtain from the ASUS website. I filled out the required information, including my device's serial number and IMEI, and submitted the request. After a few minutes, I received an email with the unlock code.

I copied the code and pasted it into the command prompt, and then pressed Enter. The device screen went blank for a few seconds before displaying a confirmation message: "Unlocking bootloader succeeded!"

I had done it! My Zenfone 9's bootloader was now unlocked, and I was one step closer to customizing my device to my heart's content. I couldn't wait to explore the world of custom ROMs, kernels, and mods.

The Aftermath

With my bootloader unlocked, I felt a sense of liberation. I could now install TWRP, a custom recovery, and flash custom ROMs like LineageOS or Paranoid Android. I could also root my device, which would give me superuser access to modify system files and settings.

However, I was also aware of the risks involved. Unlocking the bootloader had voided my warranty, and I had to be careful not to brick my device. I made sure to follow best practices and take regular backups of my data.

The journey had been worth it, though. I had gained a deeper understanding of the Android ecosystem and had taken control of my device. The Zenfone 9 was now mine to tinker with, and I was excited to see what the future held.