 Phone must be rooted!
If the software can't root the phone automatically, 
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on "Build number" in "Settings"-"About phone" to enable "Developer options" in Android 4.2+.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Press "Unlock" button for direct unlock or "Read codes" to read security codes.