Make sure you have the necessary USB drivers installed on your computer.
If a prompt appears asking you to disconnect the phone, remove the battery, reinsert it, plug the cable back in, and press the power button briefly to kickstart the flashing process. Step 4: Post-Flashing Steps nokia+e71+rm346+latest+flash+file+install
Flashing is the process of rewriting the phone's internal storage with a fresh copy of the operating system (Symbian S60v3). Users typically need to perform this procedure for several common reasons: Make sure you have the necessary USB drivers