How to determine the current signal strength

Run the display cellular command and check the value of the Current RSSI field in the displayed output information. If the RSSI is smaller than -85 dBm, the signal strength can be deemed as weak. In this case, data services run in a low rate and are not stable. In an environment where the RSSI is smaller than -100 dBm, some data cards cannot even register to networks or dial up.

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