N73 Software update 4.0839.42.2.1 failed

i will give you the link it may help you
http://montakhab.wordpress.com/2010/02/05/flashing-dead-bricked-nokia-phones/

first of all you have to download the software updater from the nokia webite..and once your done,connect your cellphone to the computer with a USB cable..

update software:
With device software updates and application updates, you can get new features and enhanced functions for your device. Updating the software may also improve your device performance. You can update your device's software using the Software Updater in your device or using the Software Updater PC application. Learn how to update your device's software using both methods.

It is recommended that you back up your personal data before updating your device software.

Warning: If you install a software update, you cannot use the device, even to make emergency calls, until the installation is completed and the device is restarted. Be sure to back up data before accepting. installation of an update.

Downloading software updates may involve the transmission of large amounts of data (network service). Make sure that the device battery has enough power, or connect the charger before starting the update. After you update your device software or applications, the instructions in the user guide may no longer be up to date.

Update device software using your PC You can use the Nokia Software Updater PC application to update your device software. To update your device software, you need a compatible PC, a high-speed internet connection, and a compatible USB data cable to connect your device to the PC.

To get more information and to download the Nokia Software Updater application, go to www.nokia.com.ph/softwareupdate.

Update software over the air Your service provider may send device software updates over the air directly to your device (network service). This option may not be available, depending on your device.

Downloading software updates may involve the transmission of large amounts of data (network service).

Make sure that the device battery has enough power, or connect the charger before starting the update.

Warning: If you install a software update, you cannot use the device, even to make emergency calls, until the installation is completed and the device is restarted. Be sure to back up data before accepting installation of an update.
Request a software update

1. Select Menu > Ctrl. panel > SW update.
2. The device scans for available updates.
3. Select the desired update from the list, and follow the instructions on the screen.
4. If the installation was cancelled after the download, to start the installation, select Install sw update.

The software update may take several minutes. If there are problems with the installation, contact your service provider.

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Dear! You should update your phone from the original nokia website. I hope that it will work.

This can be fixed by giving your mobile to nokia priority centre,they will make your phone updated and make it faster.

Hi

For updating your firmaware of Nokia N73

You need to Download The following tools

1. Nokia Pc Suite
2. Nokia Software Updater

or else Nokia Ovi Suite

But i Will say the methods using Nokia software Updater

• Download Nokia pc suite from

http://www.softpedia.com/progDownload/Nokia-PC-Suite-Download-11999.html

• And Nokia software updater From

http://www.softpedia.com/progDownload/Nokia-Software-Updater-Download-141287.html

Install Nokia pc suite then Nokia software updater


It will ask for your PC to restart
Continue ,then Select Nokia software updater .
Connect your phone

It will Find out the connected phone

Before Proceeding further: A Word of CAUTION:

• Your phone will be useless when updating failed in the Middle of updating due to System Restarts or Internet Connectin Failure or Cable Disconnection
• So consider in mind that
  

U Need

• An UN interrupted internet connection
• Do not disconnect the Data cable after full installation of new firmware
  
• Computer shall not restart or shutdown while updating

(If any of this failed the phone cannot be recovered )


So method continues.....
after Nokia software updater finds your phone, it will check for new firmware avail for your phone or not ,
\if avail select download and install


Keep in mind the Above words of caution



An advice is that If You feel not good ,then better give it yor nearest Nokia Service centre ,they will install a new firmware for your phone



Hope this will Help You........

contact an expert inn software installing

you can do it from the from the following link.
http://europe.nokia.com/get-support-and-software/product-support/nokia-n73/pc-software

kindly update your nokia phone through nokia software updater ..
http://www.nokia.co.in/get-support-and-software/download-software/device-software-update/download

SIM IN TO PROBLEM ON OFF PLEEJ FORMET SYSTEM

sir, this may be due to virus... please give it local service station.. hope i have helped.. thank you sir