Be Safe with Your Unlocking Service
In some countries, the iPhone 4 is locked to the mobile service provider that has supplied you the unit. If you wanted to switch to another provider because of better service features, you will have to unlock iPhone 4 first. There are service centers you can go to have it done, but you can also do it on your own just by downloading a certain software. Because this phone is quite expensive, you may be better off bringing your phone to an expert who has had a lot more experience doing this task than you. In case you are having someone else unlock it for you, it is always a safe practice to know the credentials and skills of the technician.
