No. You only need to unlock an iPhone if you want to use a different cell phone company with your iPhone.
YES DA JUST GIT a PRO
There are some organisations that can do this for you, it is very difficult to do this yourself. It depends on which carrier the iphone is locked to. There is a site that can unlock every iphone for you, they are called stockunlocks and then your problem is solved.
You can unlock your iPhone 3Gs anywhere if you have internet:)
The link below is the needed software to unlock the iPhone.
you can unlock any iphone or phone at unlock att .com i did my whole familys iphones there
To unlock iPhone 3gs on iOS 4.1 you have jailbreak your device first.
Depends on your software version if you even can unlock.
The Unlock codes for iPhone 4 to unlock the service network is usually provided by Vodafone who usually verify the information with Apple.
Yes, you can do it free.The original 2G iPhone is easiest to unlock. Software such as QuickPWN can unlock an iPhone to be used on any GSM network.However, the 3G iPhone requires a software unlock. The baseband is updated with every iPhone update, so it takes longer to find a solution. However, it is currently possible.You can unlock an iPhone by calling your carrier and asking them to submit a unlocking request. It can take up to seven days for the request to go through.
No, you can even unlock the iPhone when Jailbroken.
Yes
If you can't open your iPhone 5c because you forgot the passcode, maybe you can try MagFone iPhone Unlocker to unlock your device. You can easily unlock your iPhone within 4 steps. The first step is to connect your iPhone with the computer and open MagFone iPhone Unlocker, Then put your iPhone into DFU Mode or Recovery Mode, download and verify the Firmware Package. The last step is choose to Unlock your iPhone without Passcode.