Design of a multiband internal antenna for mobile handset applications is presented. Two antenna elements are formed on top and bottom of the common substrate and connected by metallic pin. Resonant frequency of each element is almost independent. Matching the impedance with the slit, a wide bandwidth is achieved so that the operating frequency bands include GSM (880-960 MHz), GPS (1575 MHz), DCS (1710-1880 MHz), USPCS (1850-1990 MHz), and UMTS (1885-2200 MHz). Radiation patterns are omni-directional for all frequency bands. Details of the proposed antenna as well as the measured results are presented.