Can an iPhone 5 be unlocked? - 1

My husband thought he lost his AT&T IPhone 5 and bought other one. Can his original iPhone be unlocked so I can use it with another carrier?

Yes. Turn off the phone and connect it to your computer while doing it be pressing the lock and home button.iTunes should pop up and restore setting will come out. Apple.com has more details about it

Yes it can. You will need to use a unlocking program found by a simple Google search. There are multiple how-to's on youtube and they are relatively simple. Remember, unlocking the phone voids any and all warranties given to you. There are no legal ways to unlock a phone unless you buy the phone unlocked from apple or you pay the early termination fee and your carrier will unlock it for you.