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