IPhone 3 - Error 105, whilst trying to restore/upgrade?

One of my firends has this Iphone 3, and asked me to try and sort it out, if you turn it on, it just asks to be connected to Itunes, no other function is available.

Tried to update it and I get the error message "The iPhone "iPhone" could not be restored. An unknown error has occurred (1015)

Anyone know what this is, and is there anything I can do?

It will not work anymore have you read the faqs.saying if your base band is updated to 6.15 then you will not be able to use the normal restore procedure you must use the custom firmware restore.
sorry