It's fine when you are clearing all your unread messages in a laptop or a desktop PC; but in iPhone? No good.
You see, at present, I mark my messages as read by individually tapping their checkboxes.
I'm not sure if the developers of iPhone thought about including this feature. But I'd like to find out is if there's a trick or I don't know, maybe there's something that would allow me to mark multiple messages to be already read not by checking them one-by-one?
I would appreciate the help!