1. Take the pin (which should be in the box that came with iPhone 4 or if not use a needle etc.) 2. Then, there should be a little hole on the rightside of the phone. 3. You push the pin hard in to...
It is the 4th model of iPhone. But iPhone generations do not go from one up: 1. iPhone 2. iPhone 3G (because of 3G connection) 3. iPhone 3GS 4. iPhone 4. 5. iPhone 4S