I've been through Samsung help and Smarty online chat to try to find out why when I access messages > 3 dots > more settings > text messages the only option i see is 'view messages on sim card' and no other options. On my s7 (and according to Smarty help) there was the option to switch on/off delivery reports. Even when googling it seems to show the s9 having the ability for reports yet mine seems to be missing completely. Any help greatly appreciated!