Yes, but only if you unlock you iphone
No
any AT&T phone that can take that sort of sim card.
Yes, you can use a Flight 2 SIM card in an iPhone 3G, provided the SIM card is compatible with the network frequencies supported by the iPhone. The iPhone 3G is unlocked or locked to a network that supports the SIM card. Ensure that the SIM card is properly activated and configured for use in the device.
You put a sim card in it.
Yes, Yes you can.
Yes as long as the phone is att and has a sim card slot
If your 3GS is locked, you can't insert a SIM card.
As long as it is AT&T, yes.
the iphone has a sim card which slots in the top of the iphone. to get the sim card tray out you have to use a pin or the special tool it came with to open it.
Yes it can be swapped. I actually swapped my razr's sim card to my iphone. Nothing happened. It works perfectly.
Yes, you will have access to all the features. It doesn't matter what SIM card is in your phone because the phone needs a SIM card, given to you by a carrier, that is supported by the phone to operate. Just put the SIM card in the HTC Wildfire and put it in the iPhone.
Put sim card into nokia, go into Contact list -OPTIONS > MARK ALLOPTIONS > MOVE SELECTED (Choose sim card)Put sim card into iphone...SETTINGS > MAIL, CONTACTS, CALENDERScroll down a bit > IMPORT SIM CONTACTS ;)frisky