Here's the original advisory.
Of course, this is a serious bug for Symbian to follow up, but it is just that - a bug. An almost impossibly-hard-to-hit-in-the-real-world one. And a serious one, in that you might need you to hard reset and resync your data back in order to restore full operation. But it's not something to be worried about.
This so-called 'Curse of Silence' is more 'nuisance-ware' than malware. In order to be affected, you've got to have a vulnerable device AND someone who's got it in for you AND has your mobile number AND knows the explicit (fiddly) details of how to contruct the special bug-hitting messages. Have you got that many enemies so as to make this a statistical likelihood? Thought not.
In the extreme circumstance that someone does go after you and tries this DoS-like attack, your device isn't then a 'brick', as stated in other irresponsible blogs, it's largely fully working and you'll be able to do last minute syncs and back up any important files on C. You'll need to hard reset/re-sync etc to get everything working again - but hey, you wanted to do a spring clean of your smartphone anyway. But, as I say, most people will never, ever, be hit by this rare exploit in the first place. So don't panic.
And everything running S60 3rd Edition FP2 (e.g. Nokia 6650, 6210, 6220, N79, N79, N85, N96, etc.) isn't affected anyway. Though I'd still look for Nokia to patch up many existing devices by rolling in the necessary Messaging bug fix into the next firmware. And, if the problem ever got even remotely serious, we're only talking about plain text SMS messages and it would be child's play for operators to simply blanket block these malformed messages in the first place.
Sigh. I despair, I really do. And you've been hyping up this story in order to get traffic to your site or blog then, as usual, shame on you.
Steve Litchfield, All About Symbian, 31 Dec 2008
PS. Happy New Year!