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  1. Home
  2. Learn/Info
  3. Understanding Cell Signal Strength

Understanding Cell Signal Strength


RSSI = Received Signal Strength Indicator. The closer to 0, the stronger the signal. RSSI = Noise + Serving Cell Power + Interference
RSSISignal strength            Rating
>= -65 dBmExcellentPremium signal strength
-65.1 to -75 dBmGoodStrong signal strength
-75.1 to -85 dBmFairMarginal signal strength
-85.1 to -99 dBmPoorDegraded signal strength
< -99 dBmDeficientSignals are unstable
RSRP (RSCP) = Reference Signal Received Power is a measurement of the “strength” of the signal received over the full bandwidth
RSRPSignal strength           Rating
>= -80 dBmExcellentPremium signal strength
-80.1 to -90 dBmGoodStrong signal strength
-90.1 to -110 dBmFair to poorSubpar signal strength
< -110 dBmDeficientSignals are unstable
RSRQ (ECIO) = Reference Signal Received Quality indicates the “quality” of signal factoring in RSSI, block resources and full bandwidth
RSRQSignal quality                         Rating
>= -10 dBExcellentPremium signal with minimal interference
-10.1 to -15 dBGoodStrong signal with moderate interference
-15.1 to -20 dBFair to poorSubpar signals with moderate interference
< -20 dBDeficientSignals are unstable
SINR = Signal to Interference plus Noise Ratio is ratio of “quality” (strength vs interference & noise) of the connection
SINRSignal strength                         Rating
>= 20 dBExcellentPremium signal with minimal interference
19.9 to 13 dBGoodStrong signal with moderate interference
12.9 to 0 dbFairSubpar signals with moderate interference
< 0 dBDeficientSignals are unstable

 

Carrier frequencies and bands
Carrier3G frequencies4G bands5G bands
VerizonCDMA 800, 1900 PCS2, 4, 5, 13, 66n40, n26-, n261, n2, n5, n66
AT&TGSMA/HSPA/HSPA+ 1900 MHz, 850 MHz2, 4, 5, 12, 14, 17, 29, 30, 66n260, n5
T-MobileGSM/HSPA/HSPA+ 1900 MHz, 1700/2100 MHz2, 4, 5, 12, 66, 71n41, n260, n261, n71
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