IPod Touch connector, called "Lightning", which replaces the 30-pin dock connector on older iPhone, iPad and iPod models. The Apple Lightning connector has eight pins and all the signaling is digital. This new connector is smaller than the previous one allowing for a slimmer form factor. Apple Lightning cables have duplicate pins on both sides of the plug, this makes the plug reversible. Various accessories are available to connect the Apple Lightning connector to the older 30-pin dock connector or USB, although not all old accessories will work, because the lightning connector cannot handle analog signals. , there are six types of
IPhone 3GS more favorable reviews mainly because it comes pre-installed with iOS 4. Jason Snell of Macworld praised the iPhone 3GS, saying that "the device's internal changes shines in the iOS 4 update, making the iPhone 3GS a worthwhile upgrade compared to its predecessor although a little too late compared to the iPhone 4." TIPB stated that "aside from hardware specific features like FaceTime, Retina Display, and gyroscope support, the bottom line is iPhone 3GS users are getting the same software that makes the iPhone 4 great." Shortly after the release of the iPhone 3GS, some users reported overheating of the device