As of May 2026, the status of the Zenfone 9 bootloader unlock is a critical point of frustration for the enthusiast community. While the phone was initially launched with a dedicated unlock tool, ASUS has since discontinued official support, leaving users with very few options for custom ROM installation. Current Official Status (May 2026)
ASUS has officially discontinued the Bootloader Unlock Tool for all mobile devices, including the
Maintenance "Ghosting": Starting in May 2023, ASUS claimed the unlock servers were down for "maintenance" and would return in Q3 2023.
The Final Decision: In late 2025, ASUS confirmed that for models released in 2023 or earlier, the tool is permanently discontinued due to "stability considerations".
Paid Service Contradiction: There have been reports of ASUS offering to unlock bootloaders for a fee (approx. $200 USD/185 EUR) at official service centers in some regions, though this is not a universally available or widely supported program. The Challenges of Unofficial Unlocking Because the
requires communication with an ASUS verification server to complete the unlock process via its APK, "offline" or standard fastboot flashing unlock commands typically do not work. zenfone 9 unlock bootloader
Server Dependency: The official Zenfone 9 Unlock Device App requires an active connection to dm.asus.com/unlock/register.
Anti-Rollback & Patches: ASUS released firmware (specifically version 33.0804.2060.189 and later) that actively patches unofficial exploits and prevents firmware downgrading.
Warranty and Security: Unlocking the bootloader (if successful) still results in a permanent loss of warranty and may cause the device to fail Play Integrity or SafetyNet checks, affecting banking apps. Attempting the Unlock (Legacy Method)
If you are on an older, unpatched firmware and want to check if the servers are reachable, the general process remains:
when will the bootloader unlocking tool be back in... - Page 2 - ASUS As of May 2026, the status of the
Verdict: Unlock only if you are a developer, a privacy enthusiast, or someone who genuinely enjoys tinkering. If you rely on Netflix in HD or mobile banking daily, think twice.
fastboot oem asus-csc_lk (this also wipes data).Some Zenfone 9 units require an unofficial firehose loader + fastboot oem asus-csc_lk commands. This method:
Not detailed here unless you confirm you’re OK with advanced, risky steps.
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:
Before touching the phone, ensure you have the following ready:
4.1 Warranty and Regional Laws Asus’s warranty terms explicitly exclude coverage for unlocked devices. However, the EU Directive 2019/771 (Sale of Goods Directive) and the US Magnuson-Moss Warranty Act argue that unlocking cannot void warranty unless the user can prove the unlock caused the defect. In practice, Asus has been known to reject RMAs for any hardware fault (e.g., dead USB port) on unlocked units, forcing users to relock and hope the fuse is not checked—but the fuse reveals prior unlock.
4.2 Right to Repair vs. Security The Zenfone 9’s unlock mechanism embodies a tension:
4.3 Supply Chain Attack Surface A locked bootloader is a defense against evil maid attacks (physical access). Once unlocked, an adversary can flash a malicious boot image that captures lock-screen credentials. Asus warns of this explicitly in their unlock tool EULA, shifting liability entirely to the user.