Thanks for the anwers, but I have a problem So because I was talking with the Carrier and they say that I must to Unlock before to change the carrier and they say that they cannot actually. What can I do? I would like to use my Iphone with my new carrier.
All of the carriers in Spain offer unlocking including Orange. You'll need to get back onto them and find out what the process is. Ask to speak to someone else if the first person you speak to claims it is not possible.
If you carrier do not unlock your iPhone then there is nothing much you can do other than selling it and buy directly from Apple unlock. Apple do not unlock iPhone that are carrier locked on user behalf. Only the carrier the iPhone is locked to can unlock iPhone for you.