Will my iPhone 5 data package work with it?
Yes. The sim will work you just need an adapter. I found one for about $1 on Amazon a little while back and it came rather quickly. I have a galaxy S3 and an iPhone 5 and the only issue that I've had was when taking my SIM card from the iPhone and putting it into the S3 was the fact that you'll have to call AT&T for data to start working.
I used an adaptor to put my iPhone 5 sim into my Galaxy Nexus. Once I input the right APN my data worked fine, I didn't have to call AT&T at all.
Yes. The sim will work you just need an adapter. I found one for about $1 on Amazon a little while back and it came rather quickly. I have a galaxy S3 and an iPhone 5 and the only issue that I've had was when taking my SIM card from the iPhone and putting it into the S3 was the fact that you'll have to call AT&T for data to start working.
But it isn't a problem otherwise?
Will I lose my unlimited data?
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What does APN mean?
When I swapped from iPhone 5 to Galaxy Note II, AT&T needed to change my data plan from "iPhone Data" to "Smartphone Data." Otherwise my Note II couldn't stay connected to LTE and would only pickup HSPA.
No, you don't. I swap my SIM (with adapter) between my Note 2 and iPhone 5 all the time. Nothing has to be done. Data works perfect on both devices. I've swapped the SIM into my old S3, Nexus 4, Optimus G, etc. Never needed to call AT&T.
But it isn't a problem otherwise?
Will I lose my unlimited data?
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What does APN mean?