First time users who began using the iPhone 4 with the hope to enjoy video calling through FaceTime were hoping for some kind of an app called FaceTime, but there is no such app. It is just an option available to the users when they make a call via Wi-Fi to another iOS user.
Since this option is switched off by default when the phone is purchased, you will have to switch it on by going to the Settings menu of the phone and then tapping on Phone. From here you will be able to switch on FaceTime.
The iPhone 4 was a welcome change for users in terms of design and performance. The only aspect that marred the use of the phone was its connectivity problem. Apple aimed at fixing this as soon as it can, but it also reveled in once again stepping up the smartphone game for competitors and users around the world.
Tim Cook also introduced Verizon iPhone 4 early in 2011, which meant that iPhone users no longer had to be limited to using the AT&T network. The WWDC (World Web Developer’s Conference) 2011, was less eventful than previous years. But Apple was prepping up for a new model which would be revealed later in that year.