After removing the cover, take out the battery. You will then see a slot for a SIM card, please insert your SIM card in the appropriate position so that the electronic contact points match.
Close the cover again and attach the two screws.
Please take into account that only one micro SIM card (compatible up to 4G / LTE) can be inserted. We recommend a simple data SIM card to make the most of online functions for traffic consideration and downloads while on the move.