I have a SIM800L module, but it cannot find the network(board LED blinking every second) The SIM card was working fine on my phone I'm sure the power isn't the problem, because I used 5v from Arduino board with a diode(drop voltage to 4.3v) and 4400uf capacitor, even tried with a 3.7v Lithium Ion …

GSM Module SIM800L no working

KASSIMSAMJI April 19, 2019, 11:52am 4

try to set cband to dcs_mode,all_band

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