a problem with the area locked SIM card, how can I unlock my iphone?
You should be able to just call up your network carrier and they can unlock it. I had the same thing. Just be prepared to wait couple weeks as the carriers say it takes up to 3 weeks to unlock. Or you can use a third party site like http://unlockingofficial.com I used this site couple times and worked great. It still takes a few days to get unlock though.