Choosing which SIM card to use for sending SMS and MMS

sms slot You can check by removing the SIM card tray and seeing how many slots it has and how the second slot is labeled, if it says SIM2 it's a dual SIM

Open the slot cover with your thumb or finger Place a nano SIM card into the tray with the card's gold contacts facing up and its cut-off corner facing out  meslot 1688 Iphone X Sim TrayMaximize your iPhone's connectivity with this 20-slot SIM card adapter, featuring independent control switches for seamless use across