During the weekend, Skype has released its final version of Skype for Windows Phone which was initially launched as a public Beta during the recent Mobile World Congress. The newly updated Skype for Windows Phone Gold version 188.8.131.52 comes with the following new features and improvements and now supports portrait mode video calling, add new contacts (Skype and phone contacts), support for participating on audio conference calls, call-in-progress notification, ability to mark all messages as read, block/unblock/view blocked contacts and the support of 18 languages. Nevertheless, not changed and due to the design limitation of Windows Phone, communications will be received only when the Skype app is in foreground.
However, other issues reported on the beta version were fixed and includes numerous crashes, performance issues, and navigation problems as well as it's now possible to call 1-800 toll free numbers without Skype credit as well as it's possible now to place calls with a premium subscription, even with a zero Skype Credit balance.
Other issues are not yet fixed and either Skype limitations on Windows Phone or general Windows Phone limitations. This includes only one valid phone number for each native contact will be displayed when you choose to call someone from the phonebook; only valid phone numbers in native phonebook contacts will be displayed from within Skype. Valid phone numbers require a country code (e.g., +44 for the United Kingdom) to be stored as part of the phonebook's phone number; a conference call will appear as a 1:1 call. The chat and profile views are between the Windows Phone recipient and the conference call host; Instant Messages sent to an offline Skype client will appear as successfully sent, not as "pending"; video calls to Skype for Windows Phone require Skype 5.0 or later for Mac or Windows; there is no visible indication if a call is placed on hold from a remote party; some events such as an incoming phone call, alarm or low-battery notification may end a Skype call; Bluetooth headsets are not supported for Skype calling on Windows Phone; Skype does not work when device is connected to computer using USB cable; very long messages may be not displayed properly in the Skype for Windows Phone; sending a Skype SMS and retrieving Skype voice messages are not supported on Windows Phone.
Last but not least, Skype requires Windows Phone 7.5/Mango with a minimum of 512 MB of memory for installation and use. It's now available free of charge from the Windows Phone Marketplace.
Cheers ~ Arne