A novel printed slot antenna is presented to meet the requirement of low profile and multiband for a mobile phone. The antenna is printed on a 0.8 mm thick FR-4 substrate with two slots etched on the ground plane. One of the slots has a rectangular shape and the other has a hybrid shape composed of a rectangle and a circle. The antenna is fed by a 50 Ω microstrip connected to a circular patch and a rectangular strip, forming an inverted-L shape. The footprint of the folded portion of the feeding structure on the ground locates inside the slot region which results in a compact antenna size on the PCB board. The proposed antenna has a wideband impedance matching with measured -6 dB bandwidth of 0.695-0.805 GHz,1.5-3.2 GHz,and 4-15 GHz covering LTE700, DCS1800, PCS1900, UMTS, LTE2300, LTE2500, Global Positioning System(GPS), Wireless Local Area Network(WLAN), and Ultra-Wideband(UWB) upper band.