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.

2. Check SIM Card and Tray Ensure the SIM card is properly seated in its slot: Turn off your iPhone and remove the SIM card. Check the SIM card for any visible damage.

You can check if your device is locked through the IMEI information, or by switching out the SIM card, or by checking via the device's mobile settings.

Before you can activate your SIM, you need to know which type of SIM your device supports, allowing you to choose between an eSIM or a physical SIM card. Here's how to check this out on Android or ...

Activate a new SIM card with Cricket According to Cricket's website, if you order your service online, you'll use the same avenue to activate your new SIM.

For years, this chip was on a physical card that you could swap in and out by ejecting a SIM card tray from your phone. Most modern phones, however, also support eSIM.

Use a SIM card to check if your phone is unlocked The most foolproof way to determine if your phone is carrier locked is by trying a SIM card from a carrier that uses a different network.