In the past few months, Apple has been struggling to provide enough stocks for their latest smartphone, iPhone 4S. With high numbers of demand, some countries have not been able to acquire the iPhone 4S.

Like with the previous releases of any iPhone model, the iPhone 4S also comes with down turns. Some problems seen in the past few months include poor battery performance (due to iOS 5), audio echoes during phone calls and connection issues for both 3G and WiFi.

These problems have already reached Apple and now it was added that some users encountered “No SIM Card installed” error. Unlike the battery bug which is mostly felt by all the iPhone 4S owners, the “No SIM Card installed” error is probably lesser but it does bothered some of the users since it will make their handsets unusable when this occurs. Rebooting the device will fix the problem but it usually returns almost every day. It was not clear if the problem’s cause is due to hardware, software or the SIM card itself. The best solution is to consult your wireless carrier and ask for a SIM card replacement.

If you have any problems in your iPhone 4S, please let us know and we’ll keep you updated for the upcoming news and relevant topics for your iDevice.