How To Unlock Bootloader Asus Zenfone | Max Pro M1 Without Pc

Disclaimer: Unlocking the bootloader will wipe all your data (photos, apps, contacts). It also voids your warranty and makes your device potentially less secure. Proceed only if you understand the risks. This method requires specific app versions and an internet connection.

The Asus ZenFone Max Pro M1 (codenamed X00TD) is a legendary budget smartphone, known for its massive battery and vanilla Android experience. For enthusiasts, unlocking the bootloader is the gateway to custom ROMs, root access (Magisk), and kernel tweaks.

Typically, Asus provided an official unlock tool, but that required a PC. However, as the device aged, developers discovered exploits that allow unlocking directly from the phone itself.

Here is the reality check: True "PC-less" unlocking for this phone is rare. Most methods require a PC for the initial fastboot commands. But, if you are already on a custom recovery or a hacked stock ROM, you can bypass the PC. For a clean, stock device, you need a workaround.

This article will cover three distinct scenarios to unlock without a traditional Windows/Mac PC, using only the phone and an OTG cable (or internal exploits).

Between 2018 and 2019, a developer known as Sujeet created an APK specifically for the ZenFone Max Pro M1 that exploited a vulnerability in Asus's early firmware. This app sends a raw command to the bootloader without needing a PC.

This is the only reliable "no PC" method.

The ASUS Zenfone Max Pro M1 (codenamed X00TD) is a beloved budget device from 2018, famous for its massive battery and clean Android skin. Under standard conditions, unlocking its bootloader requires a PC running fastboot commands using the official fastboot oem unlock command or the deprecated ASUS Unlock Tool App.

However, situations arise where a PC is unavailable:

The hard truth: There is no direct, one-click APK that unlocks the bootloader on the stock firmware for X00TD without a PC. ASUS removed the official unlock app from the Play Store and it requires server-side authentication. Therefore, "without a PC" means you must already have custom recovery installed or root access via other means. This article assumes you are on a modified or vulnerable software state.

Visit a friend with a laptop, spend 3 minutes running fastboot oem unlock, and be done. It saves hours of frustration. But if you absolutely cannot access any computer, the dual-phone OTG method above is your only proven path.

This guide is based on community research from XDA Developers (thread 3826534) and real-world testing on firmware version WW-16.2017.2004.083. Your mileage may vary. Always backup your data first.

If you truly cannot use a Windows PC, here is a workaround:

Before attempting any unlock procedure, the user must be aware of the following:

Asus released an official "Unlock Device App" for the ZenFone Max Pro M1. In 2024/2025, the official servers may be down, but older versions of the app (v2.0, v3.1) do not require a PC.

It is not possible to unlock the ASUS ZenFone Max Pro M1 bootloader entirely without a PC. The device hardware and firmware architecture mandate a Fastboot command signal, which must be sent from an external host computer.

Recommendation: If the user does not own a PC, they should:

Unlocking the bootloader on the Asus Zenfone Max Pro M1 (ZB601KL/ZB602KL) without a PC was originally possible using an official Asus APK. However, recent reports from the Asus ZenTalk community indicate that Asus has largely deactivated the servers required for this tool to function, making it unreliable or completely non-functional for many users.  Method: Using the Official Unlock Tool APK 

If the official servers are active for your specific region or firmware, you can attempt to unlock directly on the device.  Prerequisites: Back up all data; unlocking wipes the device.

Enable "Unknown Sources" in your security settings to install third-party APKs. Ensure a stable internet connection. Step-by-Step:

Download: Search for and download the UnlockTool_9.1.0.3_180621_fulldpi_signed_ZB601KL.apk from reputable sources like the XDA Developers forum or GitHub. Install: Open the APK and install it on your phone. Run: Launch the app and read the terms and conditions. Unlock: Tap the button to "Unlock your device." how to unlock bootloader asus zenfone max pro m1 without pc

Reboot: If successful, the device will automatically reboot and perform a factory reset.  Current Critical Limitations 

Server Shutdown: Asus has officially ended updates and maintenance for the Max Pro M1. This includes the authentication servers needed for the APK to work. If you receive an error like "Internet connection failed" despite having Wi-Fi, the server is likely dead.

Missing OEM Toggle: Users frequently find that the "OEM Unlocking" option is missing from Developer Settings in newer stock firmware, which blocks the tool.

No Unofficial "No-PC" Alternative: There is currently no stable "no-PC" unofficial method (like a one-click root exploit) for this device. Almost all reliable current methods require a PC to run Fastboot commands.  Recommended Alternative (Requires PC) 

Because the APK method is now unreliable, most users use a small "Unlock.bat" file on a computer while the phone is in Fastboot Mode (Volume Up + Power). This method is "unofficial" but highly effective and does not rely on Asus's defunct servers. 

Unlocking the bootloader on an ASUS ZenFone Max Pro M1 (ZB601KL/ZB602KL)

without a PC is technically possible but significantly more challenging due to ASUS shutting down its official unlock servers in 2023 ASUS - ZenTalk

Below is an overview of the methods and critical warnings for this process. Important Prerequisites and Risks Warranty Void

: Unlocking the bootloader officially or unofficially will immediately void your device warranty.

: This process triggers a mandatory factory reset, wiping all internal storage. Ensure you have a complete backup. Server Status : ASUS removed the official Unlock Tool

from their site in August 2023, making the standard "without PC" APK method highly unreliable or non-functional. Method 1: The Official APK (Legacy Method) Historically, ASUS provided an official Unlock Tool APK

that allowed users to unlock the bootloader directly on the device. Enable Unknown Sources Settings > Security and enable "Unknown Sources". Install the APK : Locate the specific APK for your model (e.g., UnlockTool_9.1.0.3_180621_fulldpi_signed_ZB601KL.apk ) and install it. Run the App

: Open the tool, agree to the multiple legal disclaimers, and press the "Unlock" button. Verification

: If the servers were active, the device would reboot and perform a factory reset, indicating a successful unlock.

Note: Because ASUS servers are currently down, this app often returns a "Network Error". Method 2: Two-Device OTG Method (PC Alternative)

If you do not have a PC, you can use another Android device to act as one using an OTG adapter

Unlocking the bootloader on your Asus Zenfone Max Pro M1 allows you to install custom ROMs, recovery environments like TWRP, and gain root access. While the official method usually involves a computer and Fastboot commands, many users prefer a mobile-only approach.

It is important to note that unlocking your bootloader will factory reset your device and void your warranty. Always back up your data before proceeding. Prerequisites Before You Begin

Before attempting the unlock process, ensure your device meets these requirements:

Battery Level: At least 60% to prevent shutdown during the process. Disclaimer: Unlocking the bootloader will wipe all your

Data Backup: Move photos, contacts, and files to cloud storage or an SD card.

Official Unlock Tool: You will need the Asus Unlock Device Tool APK (available on the Asus support website).

Unknown Sources: Enable "Install from Unknown Sources" in your security settings. Step 1: Download the Official Unlock Tool

Asus provides a dedicated application for unlocking the bootloader. Since you are not using a PC, you will download this directly to your phone. Open your mobile browser. Search for the Asus Zenfone Max Pro M1 Support Page. Navigate to the Driver & Tools section. Select Android as the OS. Find the Unlock Device App and download the APK file. Step 2: Install and Configure the App

Once the download is complete, you need to install the application. Locate the APK in your Downloads folder. Tap the file to install it. Open the Unlock Device app. Read and agree to the Terms and Conditions.

Check the box stating you understand the risks of unlocking. Step 3: Executing the Unlock Process

This is the final stage where the software modifies your device's firmware settings.

Inside the app, tap the button labeled "Press to unlock your device."

The phone may prompt you for your screen lock PIN or password. Your Zenfone Max Pro M1 will automatically reboot.

A warning message will appear during the boot sequence indicating the bootloader is unlocked.

Wait for the phone to finish the factory reset and boot back into the Android setup screen. Troubleshooting Common Issues

If the app fails or gives an error, consider these common fixes:

Network Connection: Ensure you have a stable Wi-Fi connection, as the app needs to communicate with Asus servers.

Firmware Version: Some very old or very new firmware versions might block the tool. Ensure your system software is up to date.

Asus Account: Some regions require you to be logged into an Asus account on the device before the tool will function. Verification

To confirm the process worked, go to Settings > About Phone > Software Information and tap Build Number seven times to enable Developer Options. In Developer Options, look for the OEM Unlocking toggle; if it is greyed out and says "Bootloader is already unlocked," you have succeeded.

The rain hadn't stopped for three hours. Arjun sat on his worn-out carpet, the Asus Zenfone Max Pro M1 cold and dark in his palm. The bootloader was locked. The update had failed. The phone was a brick.

Every tutorial online shouted the same impossible command: Requires a PC.

But Arjun’s laptop had died a week ago—a fried motherboard, a whiff of ozone, and silence. He had no USB cable, no fastboot tools, no "allow OEM unlocking" checkbox already ticked. He had only the phone, a SIM card, and a slow-burning obsession.

He started with Termux, the terminal emulator. He typed reboot bootloader with trembling fingers. The screen flashed white, then black. The three ugly icons appeared—Start, Restart Bootloader, Recovery. But without a PC, fastboot oem unlock was just a ghost command. The phone simply stared back at him. Between 2018 and 2019, a developer known as

Think, he told himself. The bootloader is a lock. Every lock has two keys: the official one and the broken one.

He remembered an old XDA post from 2018. Someone had found a glitch in the Asus Zenfone Max Pro M1’s emergency dialer code. A buffer overflow. Before a security patch fixed it, you could type a specific string—*#*#7378423#*#*—and then a hidden menu would appear.

He dialed it. Nothing.

He tried multiple variations. He tried entering while in safe mode (Vol Down + Power). He tried during the boot animation’s first microsecond. Still nothing. The glitch was long dead.

He moved to the next myth: the "root without PC" via an old, unpatched vulnerability in the stock recovery. He booted into recovery (Power + Vol Up). The Android droid lay on its back, chest open, a red triangle exclaiming over its dead body.

No "Apply update from ADB." No "Fastboot." Just basic options.

But then he noticed something. The phone was hot. The July humidity made the screen greasy. And in the recovery menu, if he pressed Power + Vol Up + Vol Down simultaneously and held it for exactly eleven seconds, the screen flickered.

A new line appeared: "Engineering Mode."

His heart hammered. Engineering Mode was deep firmware territory—usually reserved for factory technicians. Inside, there was a sub-menu called "SECURE_UNLOCK" . It was grayed out. It demanded a factory token. But the phone was desperate. The battery was at 73%. The rain kept falling.

Arjun didn't have a token. But he had an old trick: the "hammer test." In Engineering Mode, you could run hardware diagnostics. One of them was a raw NAND read/write test. It wasn't designed for unlocking—it was designed to check memory sectors.

He navigated: Debug → NAND Access → Userdata → Misc.

The misc partition held the bootloader lock state. On a PC, you’d use fastboot. But here, in Engineering Mode, he could overwrite hex values directly. He had to guess. He changed 0x01 (locked) to 0x00 (unlocked) in the specific offset he’d once seen in a leaked source code screenshot from 2019.

He saved. The phone vibrated once—a long, unhappy shudder.

He exited Engineering Mode. He pressed Power to reboot.

The screen lit up. The Zenfone logo appeared. And then—a screen he’d never seen before: "Your device software can't be checked for corruption. Press volume up to continue."

He pressed Volume Up.

The phone booted. On the desktop, a notification appeared: "Bootloader unlocked. Device integrity cannot be guaranteed."

Arjun exhaled. No PC. No cables. Just raw, reckless navigation through forgotten menus and a single, surgical hex edit.

He leaned back against the wall, smiling at the rain. The phone was his now—truly, fully, dangerously his.