This study analyzes the quality of Telkomsel’s 5G cellular network at Lombok International Airport in outdoor and indoor areas. Measurements were conducted using a three-day walk test method with a POCO X5 5G smartphone, G-NetTrack Pro, and OpenSignal applications. The analyzed parameters included Reference Signal Received Power, Reference Signal Received Quality, and Signal-to-Interference-plus-Noise Ratio. The results show that the average RSRP value in the outdoor area was -88 dBm, while the indoor values on the first, second, and third floors were -89 dBm, -85 dBm, and -89 dBm, respectively. The average RSRQ values were -11 dB outdoors, -11 dB on the first floor, -10 dB on the second floor, and -12 dB on the third floor. Meanwhile, the outdoor SINR reached 10 dB, while indoor SINR values were 16 dB, 19 dB, and 13 dB. Overall, Telkomsel’s 5G network performs well, although outdoor optimization remains necessary
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