Hi guys, thanks for the valuable feedbacks. Here's the thread that indicated the version that's installed in Singtel N810.

http://www.internettablettalk.com/fo...ad.php?t=21450

Internet Tablet OS version: RX-34+RX-44_2008SE_2.2007.51-3.4.SINGTEL_PR_SIO

This version of firmware is preventing me from updating to the latest
version. And the only way which seems would be to use a linux comp.
I am currently waiting for the Nokia engineer to call me. Hope something could be done about it! If not, then I would have to live with it! Cheers!