Some owners of Apple's new iPhone 4S have been hit with SIM card error messages, even if they are connected to a CDMA carrier that does not use SIM cards. One reader ...

Do you get the error message “No SIM Card Detected” or “No SIM Card Installed” after inserting a SIM card into your phone? This problem often occurs when you ...

Once you’ve activated your iPhone with your carrier, it should continue to work on the cellular network without any problems as long as you’re within range of a tower. Nevertheless, the vagaries of ...

The iPhone 15 relies on your carrier’s SIM card to connect to cellular networks. A “No SIM Card Detected” error indicates a disruption in this essential process ...

The iPhone Air has been struggling to find an audience since its release, but a Chinese modder managed to fix the biggest ...

As noted in a recent viral video, some people who have installed the latest version of iOS have reported that their phones are suddenly losing signal or reporting that they have no SIM card. In some ...

iPhone 4S users are reporting SIM card issues with their handsets. A thread about the topic on the Apple support site has now accumulated more than 200 posts and 30,000 views, suggesting that the ...

What is a SIM card used for? A SIM card, or a subscriber identity module/subscriber identification module, is a tiny memory card that contains unique information and is linked to a particular network ...