An electronic device, comprising: a display; an enclosure housing the display and comprising: an outer periphery member (1008, 1208) defining a side surface of a first portion of a sidewall of the enclosure, the outer periphery member (1008, 1208) comprising a metal segment that is configured to operate as an antenna; a front cover assembly attached to the outer periphery member (1008, 1208) and having a front glass member (1002, 1202) defining substantially all of a front surface of the electronic device, the front cover assembly defining a second portion of the sidewall; a back cover assembly attached to the outer periphery member (1008, 1208) and having a back glass member (1016, 1216) defining substantially all of a back surface of the electronic device, the back cover assembly defining a third portion of the sidewall; and an internal platform (1012, 1212) attached to the outer periphery member at multiple connection points thereby defining a structural connection to the outer periphery member, the internal platform including one or more metal elements around which a plastic is molded, wherein portions of the metal elements extend beyond the plastic periphery so that the internal platform can be coupled to the outer periphery member via the metal elements. a display; an enclosure housing the display and comprising: an outer periphery member (1008, 1208) defining a side surface of a first portion of a sidewall of the enclosure, the outer periphery member (1008, 1208) comprising a metal segment that is configured to operate as an antenna; a front cover assembly attached to the outer periphery member (1008, 1208) and having a front glass member (1002, 1202) defining substantially all of a front surface of the electronic device, the front cover assembly defining a second portion of the sidewall; a back cover assembly attached to the outer periphery member (1008, 1208) and having a back glass member (1016, 1216) defining substantially all of a back surface of the electronic device, the back cover assembly defining a third portion of the sidewall; and an internal platform (1012, 1212) attached to the outer periphery member at multiple connection points thereby defining a structural connection to the outer periphery member, the internal platform including one or more metal elements around which a plastic is molded, wherein portions of the metal elements extend beyond the plastic periphery so that the internal platform can be coupled to the outer periphery member via the metal elements. an outer periphery member (1008, 1208) defining a side surface of a first portion of a sidewall of the enclosure, the outer periphery member (1008, 1208) comprising a metal segment that is configured to operate as an antenna; a front cover assembly attached to the outer periphery member (1008, 1208) and having a front glass member (1002, 1202) defining substantially all of a front surface of the electronic device, the front cover assembly defining a second portion of the sidewall; a back cover assembly attached to the outer periphery member (1008, 1208) and having a back glass member (1016, 1216) defining substantially all of a back surface of the electronic device, the back cover assembly defining a third portion of the sidewall; and an internal platform (1012, 1212) attached to the outer periphery member at multiple connection points thereby defining a structural connection to the outer periphery member, the internal platform including one or more metal elements around which a plastic is molded, wherein portions of the metal elements extend beyond the plastic periphery so that the internal platform can be coupled to the outer periphery member via the metal elements.