I own the ingenious iPhone, when i buy the unusual 3G iPhone, can i merely put my SIM card i own immediately surrounded by it?

Can i just take the SIM card out of my iPhone in a minute and put it in the 3G and still be on the same contract?

---

Answers:    Yes, but you will hold to update your plan.

---

Check out http://www.3G-iPhones.org for more info

---

How can I get/download ringtones surrounded by my iphone directly?

I am buying a clean phone and it comes down between the modern 3g iphone and the cingular tilt which ones better?

I own an iphone and instead of using the ringtones already within the phone?

3g iphone or Sprint Instinct??

Would a headset similar to this work near an iphone? ?