Use the Nokia Software Recovery Tool to recover your
phone if you have software or software update problems. If your phone is
not responding, it appears to be stuck or is not starting you can try
to recover it at home before initiating a repair.
If i have helped at all a click on the white star below would be nice thanks.
05-02-2014 14:44 - edited 05-02-2014 14:45
Here's the FAQ link for the tool (with basic prerequisites):
bear in mind that this tool will delete all the user data from your phone, so it should be used with caution.
In my 920, Nokia Software Recovery Tool is suggesting to install the same software version already have. 3051.40000.1349.0001. Does it has any sense?