main problem, slow respond on any sort of setting. the stickers are not working, the download link is not visible. to setup user ID, the app doesnt recognize bad format of ID. the response was, no connection to Internet. instead, the app should detect the input and provide alert. the notification is slow as well. after a message was received and read, the notification popped up at phone sleep which is 3 to 5 minutes later. with all these problems, messaging is working fine though. but it would be nice if the action of the typing process is shown from a friend. tested from iPhone 5.1.1.