How to upgrade your Nokia phone?

I am using a Nokia 3120 classic, and i noticed many discussion about upgrading from firmware 7.16 to 9.41. Due to unknown reason (itchy hand), I tried to upgrade it. Thought of doing it long time ago but since I don't have the USB cable until yesterday when it comes with my father new handset.

First you need to have things below:

• Nokia phone (Fully charged)
  
• Nokia USB cable CA-101 (Cannot update via bluetooth, memory card etc.)
• Stable and fast internet
• Nokia software updater (download at http://www.nokia.com.my/A4500249)

1. Backup all your data in phone! (Menu>Setting>Sync & backup>Create backup)
2. Save backup file in your memory card or better still in your computer
   
3. Install Nokia software updater (NSU)
   
4. Connect your phone to computer via usb cable
5. Choose PC Suite in phone
6. Load NSU and follow the instruction to complete
   

Upgrading is quite an easy and simple procedure, but my phone turn out to be 'taiwan-ised' when I noticed I can't type Chinese input in 简体 and pinyin 拼音. Otherwise it was okay. So I want to share my experience here of how to solve it, i think quite useful for other nokia model users also.

I googled around the net and learned that everyone has its own product code (in my case is 0564330), for the same model, it can have many product codes for different regions and countries. This is because with the product code, the NSU will install the relevant softwares including language package for that region. So in order to get the Chinese pinyin input, I found that the product code 0559100 has it. It has the firmware 9.41 also. By changing the product code, the phone should have the required language.

Warning! This is an invasive procedure, any error might cause damage to your phone. If you are using original nokia phone, better go to the authorised service centre to fix it. Although i doubt they will concern about the language thing.

Now you need another software: Nemesis Service Suite (NSS)

1. Install NSS in your computer
   
2. Connect your phone to computer via the same usb cable.
3. Open NSS, click the top right button 'scan for new device'
4. Click 'phone info'
5. Click 'scan' under the action column
6. Wait for all the details appear (about half a minute)
   
7. Click the 'Read' on the right, the Product Code will appear
8. Replace the previous product code with the new one (that you have found)
   
9. Click 'Write'
10. Close NSS

Now you can update your phone again using NSU, after finish downloading and installing, your phone is up to date!

Comments mentioned there are some upgrades in the video function, otherwise i have not noticed any major changes so far. So do it only after benefits are ascertained :p