SE LT15A successfully unlock... ...[Reference]
Tools:
1. Octopus box (If not acivated for unlimited need 4 credits)
2. Usb (5310)
3. Tweezer (for test point)
4. Internet connection.
Procedures:
1. Install necessary drivers (drivers are located in "Drivers" folder);
2. Press "Unlock" button;
3. Disconnect battery;
4. Attach Testpoint and connect phone with Micro USB cable directly to motherboard USB port (don't use USB hubs!).
5. Follow software instructions (promts);

done.
SE LT15A successfully unlock...
Tools:
1. Octopus box (If not acivated for unlimited need 4 credits)
2. Usb (5310)
3. Tweezer (for test point)
4. Internet connection.
Procedures:
1. Install necessary drivers (drivers are located in "Drivers" folder);
2. Press "Unlock" button;
3. Disconnect battery;
4. Attach Testpoint and connect phone with Micro USB cable directly to motherboard USB port (don't use USB hubs!).
5. Follow software instructions (promts);

done.