The SMSPopup(https://play.google.com/store/apps/details?id=net.everythingandroid.smspopup)is awesome, But on the Android Kitkat (4.4) you can not deletesmsor mark read. After I spend a lot of time to open the SMS APPandseleted all unRead sms and mark as read. Finally, I'm tired,and Ihave an idea to put Android default SMS app and SMS Popupapptogether. So , That it. Have fun, and enjoy your life!