SURECALL's SC-SoloAI-15 4G (UL: 776-787/698 – 716) (DL:746-757/728-746) LTE cellular signal booster is a high-quality bi-directional signal booster that provides significantly enhanced 4G data reception for AT&T LTE. You will see the difference in the number of bars your computer displays and you'll notice the dramatic increase in the speed of data uploads and downloads. SureCall's 4G LTE can be used with an outdoor antenna for use at home or at the office or by directly connecting to a computer's data card or router.