1. When facing the front of the LG G7 One, the SIM card slot is on the top.
2. Insert the SIM removal tool (included in the box the phone came in) and push to eject the SIM card tray.
3. Remove the SIM card tray.
4. Insert the SIM card into the SIM/memory card tray.
Insert the memory card into the SIM/memory card tray.