Sim card slot on the SM-T510

What is the difference between SIM slot 1 and 2? sm slot Additionally, the device has a nano-SIM card slot In some regions, there will be a version with two nano-SIM card slots, as well as the eSIM smartphone slot SM GACK R1 R2 RN A1 AK time Management Group time slots Retransmission ACK slot for sensor i, GACK: group acknowledgment, R i: retransmission time

smugglers cove slot Sim Card Slot Holder Sim Tray Compatible with Samsung Galaxy Z Fold 1 : Silver