The importance of cellular communication demands to improve the quality of good and quality services in all regions including rural areas. The limitations of BTS signal propagation in Kumbe village have disrupted cellular communication services in Onggari village. By using the Yagi antenna 13 elements as a cellular signal amplifier that is modified by using a repeater so that the handphone signal can be accessed at a greater distance from the BTS location. The results obtained after mounting the signal amplifier antenna is very good where the signal increase is at 4 Barr, the signal strength is -75 dBm at a distance of 1 meter with “excellent” sound quality, while the results of the measurement of signal strength and signal quality for sunny weather are better than when it rains.