Question

 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.
http://wiki.answers.com/Q/How_does_a_sim_card_work_on_the_iPhone

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

Can I take the SIM card out of my Iphone 3G and put it in a friend's older iPhone not a 3G and expect my basic phone services and mail to work?

Stick a paperclip into the little hole on the top, and the SIM card should pop out.
http://wiki.answers.com/Q/Can_I_take_the_SIM_card_out_of_my_Iphone_3G_and_put_it_in_a_f...

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
http://wiki.answers.com/Q/If_you_buy_an_iphone_4_from_the_U.S_and_bring_it_to_Australia...

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?

IPhone 3g wont work with universal dock it says in the box iPhone iPhone 3g and iPhone 3GS and comes with the connectors but it says this accessory is not made to work with iPhone?


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