Microsoft today sent out a notification to users saying that Skype app will stop working for users on Windows Phone 8, Windows Phone 8.1, Messaging app for Windows 10 Mobile, Windows RT and TVs after July 1st. After this date, users will no longer be able to sign in to these versions of Skype.
Microsoft recently announced its redesigned version of Skype for all the modern platforms. This new Skype is rebuilt from the ground up and it vastly improves the ways you can connect with your favorite people. You can read about it in detail here.