If you use SMS message option: Request delivery notification, you probably quick notice, you have to delete all such reports manually. What could be quite hard, if you send many messages.

This program will do it automatically.

You can set the time, when it will erase reports, after the last one you've got. Additionally, this program can announce the delivery notification with a special sound, at your will.
In this case, you don't need look on screen, and turn the backlight on, because you hear the notification.