What do I do if my phone isn’t recognizing my SIM card?

If your phone isn’t recognizing your SIM card, your screen may display a message such as “No SIM card” or “Invalid SIM.”

Here are some things to try:

Restart your phone. This can refresh the connection between the device and the SIM card.
Remove and reinsert the SIM card. Before reinserting it, make sure it’s clean, undamaged and properly fits into the tray.
Test the SIM card in another phone. If it works, then the issue is with your device and not the card.
Check for software updates and install any ones that are available.
Ensure your account is active and in good standing. If it’s been suspended or is inactive, this may affect the functioning of your SIM.