What are the short message symbols and Do Not Disturb symbols on the screen of Nokia N78 mobile phone?

Friend, there should be unsuccessful news in your mailbox. Just check your outbox and delete the failed message.

In another case, you have installed reliable software, which filters some unknown short messages by default. If you don't change the settings, SMS symbols will always appear in the upper right corner of the mobile phone display, and the display mode needs to be changed. Icons appear after intercepting information, which is basically eliminated. When the icon appears, after you check the intercepted information or call records, the SMS icon in the upper right corner of the desktop is gone.