SIM or Subscriber Identity Module card is a smart card that contains all the information such as user identity, phone number, location, contact list, personal security keys, text messages, and ...

If your Android phone is showing a "No SIM Card Detected error", then you can't connect to your wireless carrier network. Here's how to fix it.

If you suspect that the problem is not the SIM card but rather due to a complex system error, contact Samsung Support for other options and official recommendations.