• Device Model: Samsung Galaxy A25 5G Japan (SCG27 au / UQ Mobile, SC-54E NTT Docomo / Japanese Carriers)
• Chipset / Platform: Samsung Exynos 1280 (5nm)
• Storage Interface: UFS 2.2
• Operating System: Android 14 / Android 15 (One UI)
• Target Recovery: TeamWin Recovery Project (TWRP) Custom Recovery
• Status: Tested & Working on Bootloader-Unlocked Japanese Units

Prerequisites & Important Warnings​

• Bootloader Unlock: Ensure carrier restrictions allow OEM unlocking. Some Japanese operator units require carrier unlock prior to OEM unlocking appearing in Developer Options.
• Knox Trip Warning: Flashing custom binaries permanently trips the Knox warranty bit (0x1), disabling Knox-dependent services such as Samsung Pass, Secure Folder, and Osaifu-Keitai (FeliCa)/Samsung Pay features tied to hardware trust zones.
• Data Loss: Unlocking the bootloader and performing data formatting wipes all user data. Back up all personal files beforehand.
• Required Files & Tools:
  
  • Odin3 (v3.14.4 or latest).
  • Official Samsung Mobile USB Drivers installed on PC.
  • Verified twrp-a25x-japan.tar file.
  • vbmeta_disabled.tar to bypass Android Verified Boot (AVB).
  • Multidisabler / Magisk ZIP file to disable dynamic filesystem encryption.

Step-by-Step Installation Instructions (Nasıl Yüklenir?)​

Step 1: Unlock Bootloader​

1. Go to Settings > About Phone > Software Information and tap Build Number 7 times to activate Developer Options.
2. Navigate to Settings > Developer Options and enable OEM Unlocking and USB Debugging.
3. Power off the phone completely.
4. Press and hold Volume Up + Volume Down simultaneously, then connect the device to your PC via a USB cable.
5. On the blue/cyan warning screen, long-press Volume Up to access Device Unlock Mode. Confirm the unlock (this wipes all user data and reboots).
6. Go through minimal setup, connect to Wi-Fi, and confirm in Developer Options that OEM Unlock is greyed out and reads "Bootloader already unlocked."

Step 2: Boot into Samsung Download Mode​

1. Power off the device completely.
2. Press and hold Volume Up + Volume Down together while reconnecting the USB cable to your PC.
3. Press Volume Up once briefly to enter Download Mode (Odin Mode).

Step 3: Flash TWRP & Patched VBMeta via Odin​

1. Open Odin3 as Administrator on your PC. The ID:COM box will illuminate in light blue.
2. In the USERDATA slot, select vbmeta_disabled.tar.
3. In the AP slot, select your twrp.tar file.
4. Go to the Options tab in Odin:
   
   • Keep F. Reset Time checked.
   • Uncheck Auto Reboot (Crucial: Prevents One UI from overwriting TWRP with the stock recovery on the first reboot).
5. Click Start to flash and wait for Odin to display the green PASS! status.

Step 4: First Boot into TWRP & Disable Encryption​

1. Unplug the USB cable.
2. Force reboot the device by holding Volume Down + Power.
3. The exact instant the display turns off, quickly switch your fingers and hold Volume Up + Power (keep the phone connected to your PC if your firmware requires a USB connection to trigger recovery mode).
4. Release the buttons once the TWRP splash screen appears.
5. Inside TWRP:
   
   • Go to Wipe > Format Data, type yes, and confirm (clears dynamic file-based encryption).
   • Go to Reboot > Recovery to remount partitions cleanly.
   • Flash Magisk.zip or a multidisabler zip via Install to maintain root privileges and prevent stock recovery overwrite.
6. Select Reboot > System.