Hold the (usually the center "OK" button or the call button). Connect the phone to your PC via USB while holding the key.
: Download a 100% tested firmware version (e.g., version 40.00.17.03 ) in .bin or .pac format. nokia ta1174 spd flash file infinity best
: The BEST2 dongle is required to interface with the phone’s SPD chipset. Hold the (usually the center "OK" button or the call button)