When your device displays a message that says "No SIM Card" in the status bar, follow these steps to determine if the issue is with the SIM card itself or the SIM card reader.
As a basic step, reboot the phone to have your device reattempt reading the SIM.
- Press and hold the Power Button
- Tap Restart
Ensure the SIM card is properly seated in the SIM tray and inserted flush with the frame. Follow the instructions in this support article for further assistance on this step.
- Any paired Bluetooth devices
- Any saved Wi-Fi networks
- Any customized cellular network settings such as APN preferences
Follow the steps in this support article to reset your network settings.
As a last step to eliminate any software related root causes, perform a Factory Data Reset on your device. Follow the instructions in this support article for further assistance on this step.