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

Official Support Status: In 2024 and 2025, many users have reported that ASUS's official unlock servers are often down for "maintenance," which may cause the APK to fail with connection errors.

OTA Updates: Once unlocked, you will no longer receive official over-the-air (OTA) system updates from ASUS.

If you find the APK method no longer works due to server issues, you may eventually need to use a PC-based unofficial "unlock.bat" script to bypass the official server check.

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

without a PC was historically possible using an official APK tool provided by ASUS. However, since late 2023, ASUS has discontinued its official unlocking servers, meaning the official APK method often fails to connect and complete the process .

Currently, the most reliable "no PC" alternative involves using a secondary Android device as a substitute for a computer to send terminal commands . Important Prerequisites

Data Backup: Unlocking the bootloader wipes all user data and performs a factory reset . Warranty: Unlocking officially voids your warranty . Charge: Ensure both devices are charged at least to 60%. Hardware Needed: ASUS ZenFone Max Pro M1 Go to product viewer dialog for this item. Another Android phone with USB OTG support (Host). An OTG Adapter compatible with the Host phone. A micro-USB cable to connect the Target to the OTG adapter. : Prepare the ASUS ZenFone Max Pro M1 Navigate to Settings > System > About Phone.

Tap Build Number 7 times until you see "You are now a developer." Go back to Settings > System > Developer Options. Enable USB Debugging and OEM Unlocking . Step 2: Prepare the Host Android Phone

On your second phone, download and install the Bugjaeger Mobile ADB - USB OTG app from the Google Play Store . This app allows the phone to act as a terminal to send fastboot commands . Step 3: Connect the Devices Power off your ASUS ZenFone Max Pro M1

Boot into Fastboot Mode by pressing and holding Volume Up + Power simultaneously until the fastboot logo appears . Plug the OTG Adapter into the Host phone.

Connect the ASUS phone to the OTG adapter using the micro-USB cable.

On the Host phone, a prompt should appear asking for permission to access the USB device; tap OK. Step 4: Execute the Unlock Commands

Steps:

1. Open Terminal and type:

   su
   echo -n -e "\x01\x00\x00\x00" > /dev/block/bootdevice/byid/metadata
   

   (This trick manually flips the unlock flag on some Qualcomm devices—dangerous, offsets vary.)

2. Or use a Magisk module called "Bootloader Unlocker" from a custom repository.

Warning: Modifying raw partitions without knowing offsets will hard brick your phone.

Prerequisites (Must Have on Your Phone)

Before attempting this, your phone must have one of the following:

1. Already Unlocked Bootloader? (Paradoxical, but if you had it unlocked before, you can relock/unlock without PC using Terminal).
2. Root Access (Magisk) on a currently locked bootloader? Impossible normally. But if you exploited a vulnerability (like old Android 8.1 with temporary root via dirtycow), you might have root.
3. Custom Recovery Installed (TWRP) – This is the most realistic scenario. To get TWRP without a PC, you would have previously used a PC. So this is a chicken-and-egg problem.

Given these constraints, the only genuine "no PC" method for a virgin, locked device involves using Terminal Emulator and exploiting known vulnerabilities from specific old firmware versions.

Step 4: Run Fastboot Locally on Device

• Download fastboot binary to your internal storage.
• In Termux, give storage permission: termux-setup-storage
• Copy binary: cp /sdcard/fastboot $PREFIX/bin/ && chmod +x $PREFIX/bin/fastboot
• Now, reboot your phone to bootloader using this command (requires root):

  reboot bootloader
  

• If you are not rooted, you cannot soft-reboot to bootloader. This is the major roadblock.

Prerequisites: What You Need Before Starting

Since you are not using a PC, you must prepare your phone manually. Follow these steps exactly:

1. Charge your battery: Ensure your ZenFone Max Pro M1 has at least 70% battery. A failure during unlock can brick the device.
2. Backup everything: Use Google Drive, a USB OTG drive, or an SD card to back up your data. The unlock process triggers a factory reset.
3. Enable Developer Options: Go to Settings > System > About Phone and tap "Build Number" 7 times.
4. Enable OEM Unlocking: In Developer Options, toggle "OEM Unlocking" ON. If this option is greyed out, you cannot proceed without an internet connection (Asus servers need to verify your device).
5. Enable USB Debugging: In the same menu, enable "USB Debugging" (this is usually needed for apps to send commands locally).
6. Install a Terminal Emulator: Since we have no PC, we need a way to run shell commands. Download Termux (from F-Droid or a trusted APK mirror) or Material Terminal from the Play Store.
7. Know your device state: This method works best on the Firmware version ending in .339 or older. Newer firmwares (Android 9/10 stock) have patched the fastboot vulnerabilities that allow PC-less unlocking.

Final Notes:

• Always make a backup of your data before attempting to unlock the bootloader or modify your device.
• The process might have fees or requirements like an unlocked account on Asus's side.

Given the constraints and to prioritize your device's safety, leveraging a PC for such operations remains the standard practice. The risks associated with attempting a bypass method could lead to device malfunction or loss of warranty without guaranteeing success.

Data Loss: Unlocking the bootloader will trigger a factory reset, erasing all your apps, photos, and personal files. Back up everything first.

Warranty Voided: Using the official unlock tool will permanently void your warranty with Asus.

Battery Life: Ensure your phone has at least 60% battery to prevent it from shutting down mid-process.

No OTA Updates: Once unlocked, you will no longer receive official Over-The-Air (OTA) system updates from Asus. Step 1: Enable Developer Options

Even when using an app, your phone needs to be prepared for the modification. Open Settings > System > About Phone.

Find the Build Number and tap it 7 times until you see the message "You are now a developer!". Go back to System > Developer Options. Toggle on USB Debugging and OEM Unlocking (if available). Step 2: Download the Official Unlock Tool APK

Asus released a dedicated mobile application for this device to simplify the process.