When you insert a SIM card into the tray, it activates your device's cellular connection. This allows you to make phone calls, send text messages, and access the internet using your cellular data plan. If you do not have a SIM card installed, you will not be able to use cellular services on your device.
Some devices have a single SIM tray, while others have dual SIM trays. Dual SIM trays allow you to use two SIM cards at the same time, which can be useful if you have multiple phone numbers or network providers.
Here is a step-by-step guide on how to insert a SIM card into a SIM tray:
1. Power off your device.
2. Locate the SIM tray. It is usually a small, rectangular slot on the side or back of your device.
3. Insert the SIM card into the tray. Make sure the gold contacts on the SIM card are facing down.
4. Push the SIM tray back into place.
5. Power on your device.
Once you have inserted the SIM card, you should be able to use cellular services on your device. If you are not able to connect, contact your network provider for assistance.