A mobile device comprising: an intermediate frame structure having a side edge frame forming a side edge of the mobile device, the intermediate frame structure further comprising a horizontal baffle that has a rim being connected to an interior wall of the side edge frame; the mobile device further comprising: a screen module having side edges sized to fit the size of the interior walls of the side edge frame, a bottom surface of the screen module being connected to an upper surface of the horizontal baffle when the screen module is assembled with the intermediate frame structure, and each of the side edges of the screen module being attached to a corresponding interior wall of the side edge frame, wherein the screen module comprises: a glass panel having side edges that are attached to the interior walls of the side edge frame, and an upper rim of a side edge of the glass panel is connected to an upper rim of an interior wall of the side edge frame; a LCD display module adhered to the bottom surface of the glass panel; and a LCD holder enclosing a side edge and a bottom surface of the LCD display module, an interior surface of the LCD holder is fitted to an exterior surface of the LCD display module, and an exterior surface of the LCD holder is fitted to the interior walls of the side edge frame and the upper surface of the horizontal baffle; a side edge of the LCD holder is attached to the interior wall of the side edge frame, and a bottom surface of the LCD holder is connected to the upper surface of the horizontal baffle when the screen module is assembled with the intermediate frame structure. a screen module having side edges sized to fit the size of the interior walls of the side edge frame, a bottom surface of the screen module being connected to an upper surface of the horizontal baffle when the screen module is assembled with the intermediate frame structure, and each of the side edges of the screen module being attached to a corresponding interior wall of the side edge frame, wherein the screen module comprises: a glass panel having side edges that are attached to the interior walls of the side edge frame, and an upper rim of a side edge of the glass panel is connected to an upper rim of an interior wall of the side edge frame; a LCD display module adhered to the bottom surface of the glass panel; and a LCD holder enclosing a side edge and a bottom surface of the LCD display module, an interior surface of the LCD holder is fitted to an exterior surface of the LCD display module, and an exterior surface of the LCD holder is fitted to the interior walls of the side edge frame and the upper surface of the horizontal baffle; a side edge of the LCD holder is attached to the interior wall of the side edge frame, and a bottom surface of the LCD holder is connected to the upper surface of the horizontal baffle when the screen module is assembled with the intermediate frame structure. a glass panel having side edges that are attached to the interior walls of the side edge frame, and an upper rim of a side edge of the glass panel is connected to an upper rim of an interior wall of the side edge frame; a LCD display module adhered to the bottom surface of the glass panel; and a LCD holder enclosing a side edge and a bottom surface of the LCD display module, an interior surface of the LCD holder is fitted to an exterior surface of the LCD display module, and an exterior surface of the LCD holder is fitted to the interior walls of the side edge frame and the upper surface of the horizontal baffle; a side edge of the LCD holder is attached to the interior wall of the side edge frame, and a bottom surface of the LCD holder is connected to the upper surface of the horizontal baffle when the screen module is assembled with the intermediate frame structure.