Begin by ensuring that the SIM card is correctly inserted into the device. Power Off the Device: Turn off your Samsung Galaxy before handling the SIM card. Eject the SIM Tray: Use the SIM ejector tool ...

Remove the SIM card from its packaging and place it on the tray. The kit has nano, micro, and standard sizes. Insert the SIM ...

insert it in the SIM tray pinhole, and press gently until the tray pops out. Most devices just have a single SIM card slot, but some might also have a spot for a MicroSD card and/or another SIM ...

Check SIM Card in iPhone Settings: Insert the SIM into your iPhone. Once your iPhone recognizes the SIM card, it will figure out the attached phone number (if there is one). Scroll down and tap Phone.