Microsoft today announced that Nokia Chat Beta for Windows Phone will end on January 15, 2015. After this date, users will not be able to sign in, message your contacts, or access past conversations using Nokia Chat Beta for Windows Phone. Nokia Chat was useful for people who were using Yahoo Messenger service as there is no official client on Windows Phone Store.
Microsoft is inviting users to begin using Skype for Windows Phone which offers Skype to Skype video and voice calls as well as send instant messages to friends and family around the world.
Download Skype app here from Windows Phone Store.