iPhone 4S users who've experienced issues with their SIM cards, and they'll tell you this is very much the case. While we have no reason to believe a majority of iPhone 4S owners are affected, the problem appears to span across numerous carriers and parts of the globe -- even Sprint and Verizon Wireless users aren't immune. Some report resolving the problem with a new SIM card, while others have reason to believe it's the reader itself. Then there's a group known as Woo Servers, which suggests the malfunction is related to a short circuit caused by a design flaw with the SIM card tray. They've provided a detailed list of instructions to remedy the problem, with a simple piece of tape as the cure. Sadly, not everyone seems to benefit from the advice. So, Cupertino, care to lend a hand?