The iPhone must be used with its exclusive carrier in the United States (AT&T) and the U.K. (O2), but in Germany (T-mobil) and France (Orange), local laws prevent competitor lockout, and unlocked iPhones are available there (for a premium cost). Anywhere Apple does business, however, unlocking the phone via unauthorized means will void the warranty on the unit.
Yes, you can now buy the iPhone 4S unlocked direct from the Apple website
You can visit apple.com or visit a local apple store for unlocked iPhone.
i believe it is $700 to buy one unlocked directly from apple
Apple makes the iPhone, and in the US it is only available on the AT&T network, unless you purchase an unlocked model, in which case you could also use it on T-Mobile's network as they are the only other GSM carrier in the US.
The benefit of having an unlocked apple iphone 4s is that you can use it with any carrier so you don't have to worry about it not working and having to get a new one with a contract.
If you unlocked your iPhone it is easy to access apps store all you need is a account to download thinks from there,if you jail braked your iPhone you may download thinks through cydia only .
You can buy the iphone from apple & put it on whatever network you want to, but you cannot buy it from a phone network & change the network.
No. The iPhone currently operates only on the EDGE (2.5G) network.
The iphone will be restored using the last backup so your info will be saved and it will still be unlocked.
You can't.
Yes, wether the iPhone is legally unlocked or jailbroken-unlocked.
AT&T/Verizon allows you to use an unlocked phone. Also there are many models of the Apple IPhone. AT&T is less expensive than most of the unlocked phones. The company pays part of the cost.