For those of you running the new Skype 2.5 Beta have you been having trouble sending SMS? I have found some problems that may be the source of the issues you have been having.
I have been having fun with the SMS ability of the new Skype 2.5 Beta. But I have had some issues like SMS send failures when I know the number is right and the network should accept SMS from Skype. I had some mobile phone numbers already listed in my Skype contacts. I upgraded to Skype 2.5 in the usual fashion. I found that some numbers worked with SMS and some did not. New numbers that I put into Skype worked, that got me thinking as to why that was.
A typical number here in Australia might be "0449557250". I discovered that the "0" prefix should be omitted when using Skype, as it works with international dialing codes and these are usually not required and indeed cause problems when they are used. I found that the numbers that I had already stored in my contacts retained this "0" in front of the number and some did not. The ones that did not have the "0" worked with the SMS. So what I did in my wisdom is input-ed all my mobile numbers omitting the "0". Wrong move! They still did not work. Seems that I was too smart for the new Skype dialing wizard!
The correct thing to do is to select "Add a Contact" then select "Add new SkypeOut Contact" then select the country that the number originates from and enter the number in full (yes including the zero!). Skype will "strip" the zero out in the final number that you will see listed in your contact list. This may or may not be a bug in upgrading from 2.0 to 2.5 Beta and might be fixed in the final version.
As far as the existing numbers are concerned. It seems that Skype had failed to "strip" out the zero and that was causing the SMS failure. This was not an issue in Skype 2.0 as we were not able to send SMS and as far as SkypeOut to mobiles it did not seem to matter. What I have done is to delete these contacts and add them again in the above method and all seems to be working fine now. So try that before you throw your arms in the air screaming shite!
One other thing that I have noticed is that I am getting SMS failures from SMS messages that I know have gone through. I am not sure why that is but I know that the SMS sending feature is in early development and all the bugs have not be ironed out yet. In addition this is all part of the plan to enable Skype users to receive SMS in Skype. Now that would be cool!
Just remember that if you are using the 2.5 beta and you are having some issue that seems to be a bug, log a problem with the Skype team and let them know what it is, that way we all get a better final version!
Also check out this article as it has a lot more on SMS and what can go wrong and why and how to fix it and where this is all headed.