What if my iphone is already jailbroken and unlocked, can i upgrade?

i have an iphone thats been jailbroken and unlocked with the 3.0 and im looking to upgrade. how can i do this without disrupting anything?

What is the difference between an unlocked iphone and a “high quality” copy iphone from China?

What is the difference between an unlocked iphone and a “high quality” copy iphone from China? I can’t understand why they are so expensive on eBay and other sites offer them for less.
What about those copies that actually look like iPhones with Apple logos all over them. They are indistinguishable in the pictures but how [...]

What is a good website to order an unlocked iphone at a low price?

I want to get rid of my go phone but than I heard that you can put the sim card into an unlocked iphone. I want to do this, but I don’t know what website I should order an unlocked iphone. If you have swapped your sim into your iphone, what website did you use [...]

Does the iPhone work internationally if i get it unlocked?

I want to get the iPhone, but i don’t know how long i will be overseas. So i was wondering if the iPhone works just like the Blackberry i know that one is internationally used. Please help me to clear this up. Thanks so much!