<p>I think I'm going to buy a new cellphone. And I'm considering the iphone. I have AT&T. </p>
<p>My questions are: Can i just buy the phone from the apple store and it will work automatically? </p>
<p>Does the iPhone 4 have a sim card? </p>
<p>I really just don't know how it works if you just buy it from apple. </p>
<p>I was just at the apple store a few days ago an stupidly forgot to ask....of course...</p>
<p>I bought my iPhone 4 through Best Buy (they had an AT&T store there). </p>
<p>The jPhone uses a microsim card that is smaller than a normal sim card so if you lose your phone, you need to get a new one to put in a replacement phone.</p>
<p>It would work if you buy it from Apple, AT&T or any authorized seller of the phone. Since its AT&T your using, you will need a Microsim card, that comes installed in the phone already. If you need any help, consult the Apple forums for help.</p>