I will assume you do not mean the "Slide to Unlock".
Unlocking your phone's cellular plan is probably what you meant. Having your phone unlocked means you have the ability to get cellular service, but without need of a contract. Unlocked iPhones cost $450 more than their contracted counterparts. Your phone also becomes unlocked when your 2 year contract ends. This is why selling your old iPhone after 2 years can actually get you a net profit.
i typed this earlier on another question. on the Answers.com search bar , type in : Is the iPhone unlockable ? : this should bring you to an answer that should surely help you ! (: hope i helped,,
You can visit apple.com or visit a local apple store for unlocked iPhone.
Unless its an iPhone then it would be no.
You can check to see if your iPhone is unlocked by inserting a SIM from a different service provider and try to make a call, if its successful. Your iPhone is unlocked.
eBay or Craigslist
yes. once an iphone is universally unlocked it will work.
Yes, you can now buy the iPhone 4S unlocked direct from the Apple website
There are several providers of unlocking services for iPhones - both on location in Orlando, but if you don't have an unlocked iPhone yet, you could check out unlocked iphones on www.unlockediphones.net.
600
No!
Yes
No it has to be unlocked
Yes, you need an unlocked & Jailbroken iPhone. Which isn't cheap.