To replace a SIM card, follow these simple steps:
1. Power off your device.
2. Locate the SIM card tray on your device. Usually, it is on the side or top of the phone.
3. Use a SIM card ejector tool or a paperclip to gently eject the SIM card tray.
4. Remove the old SIM card from the tray and insert the new SIM card into the tray.
5. Carefully push the SIM card tray back into the device until it clicks into place.
6. Power on your device and wait for it to connect to the network.
Remember to backup your data, as swapping SIM cards may result in the loss of stored contacts and messages. If you encounter any difficulties, contact your service provider for assistance.