Why would you want to unlock your iPhone?

Why would you want to unlock your iPhone?

Added (1). What is the difference was jailbreak and unlock?

To go passed the home page.

To use on other carriers.

If your contract expires, you don't want to use that particular service anymore.

Say I had AT&T and their service sucked… My contract expires, and now I want to switch to T-Mobile. BOOM. Unlocking is useful.

Most phones are locked so they can only work on one network such as AT&T.

Unlocking the phone allows use on any network

Because iphone is tied up with AT&T for 2 years you can't use anyother sim or operator. This is extremely inconvenient if you roam often else you can switch sims to save money. Also it forces people to switch to AT&T if you want to use iphone in the process loosing your old number as well as your plan. Also people doent want to stick with AT&T for two years. There's also a strong market for iphones outside US so people unlock it to use in whatever country or operator they want. I know another unlock tool named R-SIM 7+, it unlock for iphone 4s and iphone 5.found it here: http://zeromartz.com/rsim7-unlock-sim-for-iphone4s-and-iphone5-p-1628.html, Have not try it but it seems true

So that you could use it on whichever carrier you want. Also it would raise the value of the phone.

Jailbreaking is essentially hacking the phone to do more stuff than what is normally allowed.