So you got the new iPhone 4S, but only to be dismayed by the fact that Siri doesn't work in Malaysia when it comes to location-based information. Ok, now put down that spoon and stop banging on your desk. Take a look at this!
Yep, it works in Malaysia. All you need to do is to install the International Locations for Siri package. Well, uh, actually you have to buy them from Cydia store. It's only USD0.99 though. Don't know what Cydia is? Nevermind.
Note: To be able to install International Locations for Siri, you will need to have Cydia installed. To be able to install Cydia, you’ll need a jailbroken iPhone. You can search the web on how to do this. I will not be held responsible if the process of Jailbreaking somehow rewards you with an alumminosilicate glass paperweight.