MediaTek (MTK) devices have SLA (Serial Link Authentication) and DAA (Download Agent Authentication) enabled, preventing unauthorized flashing, unlocking, and modifications. If you’ve ever encountered an error like “Authentication Required” while trying to flash firmware or unlock a device, this guide is for you!
In this post, we’ll explore free tools to bypass MTK authentication, allowing you to flash, unlock, and modify your MediaTek-powered devices safely.
Why Bypass MTK Authentication?
🔹 Flash official/custom firmware without restrictions
🔹 Perform IMEI repairs, FRP removal, and bootloader unlocking
🔹 Backup & restore firmware using tools like SP Flash Tool
🔹 Unbrick MTK devices stuck in Bootloop or Brom Mode
Method 1: Using MTK Auth Bypass Tool (Easiest Method)
📌 Best for beginners, works with SP Flash Tool and other flashing utilities.
Requirements
✅ Windows PC
✅ MTK USB Drivers (Download)
✅ MTK Auth Bypass Tool (GitHub)
✅ SP Flash Tool (Download)
Steps to Bypass Authentication
1️⃣ Install MTK USB Drivers
- Download and install the drivers from the link above.
- Restart your PC after installation.
2️⃣ Download & Extract MTK Auth Bypass Tool
- Extract the bypass_utility.zip to a folder on your PC.
3️⃣ Put Device in Brom Mode (BootROM Mode)
- Method 1 (Recommended):
- Power off the phone.
- Hold Volume Up + Volume Down and connect the USB cable.
- Method 2 (Preloader Mode – Alternative):
- Power off the device.
- Connect it to the PC while holding Volume Down.
4️⃣ Run MTK Auth Bypass Tool
- Open the bypass_utility folder and run
bypass.exe. - (For Python version, run
python main.py). - The tool will disable SLA/DAA authentication.
- Wait until you see “Waiting for SP Flash Tool”.
5️⃣ Use SP Flash Tool to Flash or Unlock
- Open SP Flash Tool and load the scatter file from your firmware.
- Choose options like “Format”, “Download”, or “Readback”.
- Click Download to flash firmware.
✔️ Your device is now bypassed, and you can flash without authentication!
Method 2: Using MTK Client (Advanced Users)
📌 Best for advanced users who want more control over MTK devices.
Requirements
✅ Windows/Linux PC
✅ Python 3 installed (Download)
✅ MTK USB Drivers (Download)
✅ MTK Client (GitHub)
Steps to Bypass Authentication
1️⃣ Install Python & Dependencies
- Install Python 3 and open Command Prompt.
- Navigate to the MTK Client folder and run:
pip install -r requirements.txt
2️⃣ Put Device in Brom Mode (BootROM Mode)
- Power off the phone.
- Hold Volume Up + Volume Down and connect USB cable.
3️⃣ Run MTK Client Bypass Command
- Open Command Prompt and go to the MTK Client folder.
- Run:
python mtk payload - The tool will disable SLA/DAA authentication.
4️⃣ Flash or Modify Your Device
- Use SP Flash Tool or Fastboot commands.
- Example: To dump firmware, run:
python mtk readflash --format=bin --start=0x0 --length=0x40000000
✔️ Your device is now unlocked for flashing, unlocking, or repairing!
Which Method Should You Use?
✅ For Beginners → Use MTK Auth Bypass Tool (Easy GUI-based method).
✅ For Advanced Users → Use MTK Client (More features & control).
Troubleshooting Common Issues
Device Not Detected?
- Reinstall MTK USB drivers and restart your PC.
- Try another USB cable or port.
Bypass Tool Not Working?
- Run the tool as Administrator.
- Disable Windows Defender (it may block some operations).
Stuck in Bootloop?
- Reflash the firmware using SP Flash Tool.
- Perform a “Format + Download” instead of just “Download”.
Bypassing MTK authentication lets you unlock, flash, and repair your MediaTek device safely. Whether you’re a beginner or expert, these free tools provide an easy way to bypass SLA/DAA restrictions.