INSERTING SIM CARD
Warning: do not insert or eject SIM card while the GWG
Gateway is powered on. Make sure to disconnect the
GWG Gateway from AC/DC adapter before inserting or
ejecting SIM card.
* Use a screwdriver to remove the cover from the back of the GWG Gateway
* UNLOCK SIM card holder
* Lift the SIM card HOLDER and put SIM card in it
* LOCK SIM card holder
* Put the cover back and use screwdriver PH1 type to tighten the screw
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