WARNING: Before perform firmware update, always perform phone backup! The author will NOT be held responsibility under any circumstances.
1. PRE-CHECK LIST
1.1) Make sure the phone battery is fully charged. On my case, my phone battery left with 4 bars after the update from full bar before the updates.
1.2) Remove the phone SIM and memory card.
1.3) On the 'Wireless LAN' connection to download the installer.
2. UPDATE!
2.1) Press the 'Keypad Dialler' icon.
2.2) Enter *#0000#.
Software version
V 21.0.025
2.3) Select 'Options' and then 'Check For Updates'.
2.4) Click 'Yes' on 'Connection to Internet needed...'
2.5) Click 'Accept'.
Name:
SW update v.40.0.005
2.6) Press 'Now' on 'Software update downloaded from Nokia. Install now?'
2.7) Press 'Accept' on 'Backup of phone content is recommended...'
2.8) Press 'Accept' on 'Phone may not be used during update,...'
2.9) Phone will be restart. Updating status bar will be displayed. Wait till finish. DO NOT SWITCH OFF THE PHONE. Once update done, the phone will be restart.
2.10) Press 'OK' on 'Use English'.
2.11) Wait for message 'update complete'. Press 'OK'
3. POST UPDATE!
3.1) Turn off the phone.
3.2) Insert the phone SIM and memory card.
3.3) Power up the phone.
3.4) Repeat steps 2.1 and 2.2
3.5) Notice the 'Software version' reflect to the updated version.
Software version
V 40.0.005
