I believe the new iPhones (4) take a different sim card than the old ones. But you can still usually transfer all your contacts, photos and music to your new phone anyway. I have friends that have done it themselves, and some that have had the people at the store do it for them. They have also done it switching from an iPhone to a different brand of phone.
2 years ago
Last edited at 3:43AM on 6/15/2011
Yes you can, but not with just switching the sim card. You would need to backup your old iPhone on to your iTunes account and then once you get your new iPhone sync it with the backup you created and then it will put all your apps, photos etc. On the the new phone.