I got it.Here comes. Diagnostic Mode
Hardware Virtual Serial Port required. See Driver Archive.
Turn the phone on
Go to Menu, Settings, Applications, Development
Place a checkmark on USB Debugging.
Drop down the phone’s notification bar
Click on “USB connection“
Choose PC Mode
Or:
Turn the phone off
Plug in the cable to the computer but not to the phone
Hold down the camera button
Now plug in the cable to the phone and keep holding the camera button for about 20 seconds.
Found from:CyberFlashing :: We Give You The Freedom To Cell Phone Flash!