How to Update nokia mobile software

Hi Guys i am now here with a new tutorial on how to update your nokia mobiles software.Software updating let you to get all the apploications that they are included with new package.Some phones like nokia 3110... may got some restarting problems due to lack of updating.So lets start our tutorial.
I am using nokia n73 for the tutorial purpose
As this operation is a critical one and do it @ your own risk.Your datacable lose connection,low battery may can interupt your updating and may cause damage to your phone and data.So you must be very careful while doing this.So use a good data cable n charge your battery upto full level.
First Backup your phone using nokia pc suite ( It may be avilable with your phone's cd or download fron nokia website) or if you have a memory card with enough memory then u can backup within your card.Just follow the steps to backup to mmc
go to the Tools – Memory select Options – Backup phone memory take out the memory card from the phone
Now download Nokia Software updater .Now install it n run it
Now just follow the operations insisted by the updating tool n your phone is now get updated.
Now restore your phone again by using pc suite or (if backuped in mmc Tools – Memory select Options – Restore from card).
Now your phone is fully updated.Now check your software version by using
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