A SIM card that doesn't work can cause a lot of problems. Here's how to fix the "No SIM card" error on your Android phone.

To check if your Android phone is unlocked, try swapping in another SIM card or test your network settings. If calls work, ...

A SIM card stores your subscriber identity data, which is needed to connect to a carrier's network. But do you still need one in 2025?

If your phone suddenly won't recognize your SIM card, don't panic. There are a few things you can do to try and resolve the problem. Here's what to do.

Does your phone say "No SIM," "No SIM Card Installed,” or "No SIM available"? Here's what that means and how you can fix it.

Transferring from one wireless carrier to another or getting a new phone means activating your SIM card before accessing your 5G data. If you have one of the compatible Metro by T-Mobile Android ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.

Verify if the SIM card is functional by inserting it into another phone: Use a spare phone to check if the SIM card can connect to the network. Troubleshooting Steps for iPhone Devices 1.

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead.