WHAT IS A FACTORY UNLOCK?
A factory unlock makes your iPhone able to be used on other carriers. Most of the time when people buy their iPhone its locked to the carrier they purchased from. That’s how a lot of people were able to get it at an affordable price like $199-$299. The catch is that often people have to sign a 2 year contract. Those that buy their iPhones already unlocked usually pay a much higher price. The majority of the iPhones out in the marketplace are locked to their original carrier. People who are either off their contract or are secondary owners of the iPhone but on another carrier like Tmobile or Simple Mobile to give an example often have to resort to software(jailbreaks) that are temporary in nature and have a lot of drawbacks like being tethered(means that if you turn the phone off or let the battery die, you have to do all kinds of steps to get it back up and running). Other people use GEVEY chips as an alternate. In some cases people lose some of the functions on the iPhone as Apple tries to block such hacks and puts out new iOS firmware updates. Not being able to update your iPhone to the latest firmware often means these individuals miss out on some of new tools and capabilities of their iPhone.
You can see how this can be cumbersome and a pain in the you know what. The factory unlock solution fixes all of this. Its a permanent unlock which means you can be on the latest firmware, you don’t need to jailbreak your iPhone, you use it on any GSM carrier that can support the iPhone on their network. Most of all its a permanent unlock solution.
iPhone 4 Factory Unlock