If the update stalls, briefly disconnect the device, hold the Power button until it vibrates, and reconnect it quickly.
If Phoenix doesn't see your phone, try reinstalling the Nokia Connectivity Cable Drivers or using a different USB port on your PC (avoid USB hubs). firmware update on nokia 6303 classic free
Select > "Open Product" and choose your device type, which is RM-443 for the 6303 classic. If the update stalls, briefly disconnect the device,
Open Phoenix and set the connection to the USB port detecting your phone. If the update stalls