When that happens, you might see the "your phone is not registered on a network" on your screen, which means your SIM card can't connect to your wireless provider's network.

The No SIM card detected error happens due to displaced card position, software issue, or SIM network issue. Considering the different causes of the error, here are ...

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?

Unlike our phones, the SIM cards that connect them to a network have barely evolved over the last decade or so. This can sometimes mean you'll have trouble connecting to a network, even when the phone ...

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.

Reset network settings Another troubleshooting step that you must do in this situation is to clear the phone’s network settings. This is often effective in fixing network troubles.

If necessary, you may also request a new SIM card replacement. Alternatively, you can just schedule a visit to a service center and have your phone diagnosed by a technician for hardware damage.

If you're planning to sell your Android phone or want to switch to a cheaper carrier, you'll first need to check whether the device is unlocked.