First get the Product Code for your phone. It is printed on the label under the battery. It should ne a 7 digit number starting with 0.
Once you have the code, click on the link below to check the latest firmware version for your phone. If thins is the same as what you have on your phone then you already have the latest version. If it is newer then click on the "Download" tab on the top of the webpage. Then you follow screen instruction to download Nokia Software Updater, install and follow instructions.
thanks alot..have done that but it keeps disconnecting when the software upgrade remains 5 sec.
what else can i do