I can't add my mobile number, because the carrier isn't listed in the device list.
Do you mean getting the "Verified Account" badge on your profile? If you do then you can't - it is closed to the public
With regards to the mobile verification - if your carrier is not available then read this article http://support.twitter.com/articles/41611-which-mobile-carriers-does-twitter-support
It means that you will probably be able to send texts to Twitter but not receive any.
The title needs to say "How can I verify my mobile number" instead, but that doesn't mean the answer has to 100% miss the mark given the explanation in the question body itself. Oct 1, 2010 at 17:22
@VxJasonxV - I have updated my answer Oct 1, 2010 at 17:28
Appreciate it. (1 more to go..) Oct 1, 2010 at 17:39