Are carrier models different than the Apple Store versions?

[news]

[cellulartalk]

I was thinking of taking advantage of T-Mobile's current iPhone promo. Other than presumably being locked, is there any hardware or software difference between what T-Mobile will give me and what I'd get at the Apple Store? Also, does the Apple Store service carrier models or would I have to go to...

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Courtesy of WestNet Wireless
www.westnet.ca