A compact narrow-frame antenna loaded a PIN diode for hepta-band smartphone applications is presented. The greatest highlight is that the edge of the no-ground planet is quite narrow of only 5 mm, which meets the requirements of the popular narrow-frame smartphone designs with larger touch-screens. Furthermore, the reconfigurable technology is applied to realize a wide coverage with a small volume and a compact structure. The hepta-band operation is successfully achieved by combining the two working states. Detailed considerations of the design are studied in this paper and the proposed antenna is successfully simulated, fabricated, and measured.