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SIM card holder
A SIM card holder is placed at the front of the RB900SG terminal (as shown below), and
is accessible externally. To insert a SIM card into the holder, press the yellow button,
eject the little drawer, place the SIM card inside and insert drawer into the modem (you will
hear „click”). To operate the module in a GSM/UMTS/LTE network, it is necessary to insert
a SIM card obtained from the network operator.