While trying to update to Nokia Belle with Nokia Suite, I get an error code or an error message stating that the connection to the phone was lost. What should I do?

It is normal that the phone loses connection during the reboot phase. If you wait for a while it will automatically reconnect to your PC. If you lose connection during the backup, installation or restore phase, please do the following:

  1. Disconnect the USB cable from your phone
  2. Press your phone’s power button for about 10 seconds
  3. Reconnect the USB cable
  4. Wait for the installation to continue 

Note: If this doesn’t solve your issues, try to connect your phone to another USB port on your laptop or to a USB port on the backside of your desktop PC. In some cases rebooting the computer also helps or using another PC to do the update.

Try also this:

  1. Right click the Nokia Suite shortcut icon.
  2. Then click Run as administrator.
  3. Then continue your update.

If above does not help reinstall the Nokia Connectivity Cable Driver or Nokia Suite.