Sony Xperia mobile comes with DRM/BA2 key to enable Sony proprietary features such as Bravia Engine 2 in Sony Movies app. If you unlock or accidentally flash TA partition, your key will be lost forever.
Fortunately, XDA developer, DevShaft, has created a tool called BackupTA to backup TA partition for future recovery.
- Official Forum Thread: XDA-Developers DevShaft
- Device Compatibility: Sony Xperia
- BackupTA Script (Download at Android page)
S1-1. Sony Xperia devices must be ROOTED first
S1-2. Enable USB Debugging mode
Steps to Backup:
S2-1. Download and Unzip BackupTA script
S2-2. Execute Backup-TA.bat
S2-3. BackupTA will show license and warning. Press any key to continue
S2-4. Plug in your USB cable and check your phone to allow prompt Allow USB debugging? to enable
S2-5. Select Option 1 to start Backup
S2-6. Navigate to BackupTA Backup folder to check BackupTA image file in ZIP archive
S2-7. Lastly, use two different ZIP software to check the archive is not corrupted (just to be safe)