How does a sim card work on the iPhone?

Answer A 4g phone is a lot faster than a 3g and it's a lot clearer.

Top Q&A For: How does a sim card work on the iPhone

If you buy an iphone 4 from the U.S and bring it to Australia wil it work. do i just have to unlock it. can you do that. what sim card does it work with?

If the iPhone is factory unlocked,yes u can use it If not,nope U have to jailbrake it and unlock it. Still no unlock for the 4-th iPhone Maybe the next week it's gonna to be a release

Does an iPhone 3GS sim card work on iPhone 3G?

the sim card just holds network information not phone information so yes you can transfer your sim card without any problems i had a sim card from about 3 years ago and i just bought a iphone 3gs a... Read More »

Does the iPhone 4 sim card work in the iPhone 4S?

Yes, it does. Both iPhones use the micro SIM card.

Do you need a sim card to use an iphone because I want to get a iphone 4 but i just dont want to use the phone on it. Will the iphone work without a sim card apart from the phone?