If you use an older version of Chat app on your phone, it was discontinued from October 10 2014. To keep chatting with friends after this date, you must begin using a new app or website.
If you use Yahoo! Messenger, please go to Yahoo! Messenger website on your browser.
If you are using GTalk, please go to the Google Talk website on your browser.
Choose your own replacement! The Store may contain third-party apps that you can use to access your favorite services. Go to the Store app on your phone or visit the website .