I want to install operating system once again

this may be solved with formatting
got to below given link and follow the instructions

http://www.fixya.com/support/r5875102-format_nokia_mobile_phones_3110c_2700c

Hi,
Try formatting the phone.This will help to solve this problem.If still the problem persists then update the software from any NOKIA CARE

To format nokia 3230 mobile please follow the below steps.

Please download the software called as 'Psiloc System Tools'.

You can download the system tool software from below website

http://gallery.mobile9.com/f/1047847/

Install it in your phone memory.DONOT install in your memory card because we will be removing the memory card.

Remove the memory card

Open the installed software.

Go to 'TOOLS'

You will find the option called as 'format phone',select it.

It will ask for confirmation, confirm it and it will format your phone.

It will restart while formatting and this process takes several minutes.

Once the mobile is started your mobile is formatted.

NOTE: Formatting will delete all your content from your phone memory.

Thank you

I think you should go to your narest Nokia Prirority . It is a store opened by Nokia itself . The next shop will be Nokia Care . Go to Nokia Care and tell them that you want to format your mobile . I told you to go to Nokia Care because even mobile phones have operating systems . If you see the steps to format your phone on internet , then it will erase everything , even the operating system and you wont be able to do anything on your mobile phone . In Nokia Care , they will format your phone and also install a new operating system in it , which you will not be able to download on your computer from internet .

Yes just dial this code *#0000# then your cell get reset itself after that it will come back to its original position no need of installing anything then. :)

hello ! 

there are 2 ways of dealing with this problem one is flashing(format EPROM) then install the operating system again .
Two installing mobile phone Antivirus  program then run it .

good luck 

switch off your mobile phone, hold the three buttons of your phone. menu button, and another two buttons on the upper write side of mobile phone. switch on your mobile phone. do not unhold the three buttons until nokia logo come's [hand shake]. your mobile will formatted.

Format the Memory card once and try again, there is some applications installed on the memory card which will not allow you to use bluetooth.....

You can format nokia 6270 becuase no codes of symbian operating system mobile works on it.It is a java based mobile..All you can do is Restore to factory settings in settings...But you can update the nokia 6270 firmware by installing nokia software updater and nokia pc suite...


Regards

Dilip

using pc mobile can be formatted by the software and dongle

Just follow the following steps:
1) Locate the USB port of your Nokia N72 phone. See Manual if needed.
2) If your mobile phone has a USB Data Cable supplied, connect the end that matches the hub while connect the USB end to your USB port of your PC.
3) If your mobile phone has a CD supplied, this contain the PCSuite software bundled with drivers for your PC operating system.
4) Insert the CD to your CDRom drive.
5) After step 4, you will see a window saying install PCSuite then choose Yes.
6) Choose which operating system. If you use Windows 98, then choose the driver for Windows 98.
7) After installation, reboot/restart tour PC to complete the setup process but never disconnect yet your USB Cables from your mobile phone to PC.
8) Once restarted click on the icon of the PCSuite on your PC, then check if your PC can communicate with your mobile phone and vice versa. To do this click connect via USB if the datas in your mobile phone is seen then connection is correct.

If your problem is USB Driver for Windows 98, i suggest you upgrade your PC operating system to Windows 2000 or Windows XP. Old operating platforms have driver problems when new devices are attached to. But if you choose Windows 98, you will have to browse the internet in search of drivers. Just let me know if you have not found a driver. I'll assist you with this.