Yes. If you update your iPhone's software using iTunes it will lock your iPhone again. You will then need to unlock it again.
YES it should although if its jailbroken/unlocked it will lock
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.
No You Cannot As Of Yet. I just tried it on an unlocked 3G Iphone 16 gig.
Yes, you can now buy the iPhone 4S unlocked direct from the Apple website
yes. once an iphone is universally unlocked it will work.
eBay or Craigslist
Unlocked is a past tense verb and an adjective. Verb: Dave unlocked the door just before the icicle fell. Adjective: Please lock all the unlocked doors.
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
Yes