If iPhone SIM Card Is Not Recognized
If the iPhone doesn’t recognize the SIM card, it’ll stop connecting to networks, preventing you from using wireless data and making or receiving calls.
In this case a message will pop up on your iPhone screen warning of “No SIM Card Installed”. Besides, on the screen, the carrier name and signal bars/dots have been replaced by Searching or No SIM.
It might be, the problem is just that your SIM card has been slightly dislodged. All you need to do, is to reseat it, and everything should be well. To locate the SIM Card, look for the slot with a tiny hole in. This is the tray that holds the SIM card. This slot is located in different places on different models. On the iPhone 4, 5, 5C, and 5S, the SIM tray is on the right side of the phone (these models use a microSIM, a slightly smaller, modern version of the SIM card, and SIM cards from older phones won’t work in newer models without modification).
To re-seat the SIM card in its slot, get a paper clip (SIM card removal tool!), unfold it, and gently push one end into the hole in the tray. This will pop the tray out of its slot. Push it back in immediately and make sure it’s firmly seated. Then wait up to a minute or two (may be half a minute will be enough). If you are fortunate, the warning should disappear and regular bars and carrier name will re-appear on the screen.
If this didn’t work, eject the SIM again and take it out. Make sure the card and the slot it sits in aren’t dirty. If they are dirty, clean them. Blowing into these elements might be enough, but a shot of compressed air is better. Then reinsert the SIM.
If you didn’t fix the issue, the smartphone could be malfunctioning. A good way to test this is to try inserting a SIM card from another iPhone that you know works, into your cell phone (first make sure to use the correct size) and seeing what happens. If the new SIM cards make No SIM warning disappear and signal bars reappear instead, it means that your iPhone SIM is broken.
It’s possible that the SIM card in your iPhone isn’t valid. SIM cards can be assigned to particular phone companies and customer accounts and they can be deactivated or not work at all in some countries.
If nothing works, and these steps don’t solve the problem with the SIM card, it’s very likely that you’ve got a problem that you can’t fix. It’s time to call tech support or to go for a trip to your closest Apple Store or your phone company store.
- Apple Encyclopedia: all information about products, electronic devices, operating systems and apps.
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