. Plug in your samsung s21 to the computer via usb cable and don’t forget to change the file transfer mode to being detected by the app. Slight variation may occur compared to the pictures. What does the blue dot next to the contact mean? galaxynote10 from www.reddit.com Countries and isps may be needed on this number. Market, making many of the latest galaxy innovations available for less. A single pixel, or discrete picture element, consists of a tiny dot on the screen.