- Feb 27, 2005
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I have an AT&T unlimited data plan and voice plan that I use for my BB 8820. If I remove my SIm card and place it into my Treo 750 I have full voice and Data with no issues. My question is if I buy an iPhone and insert my current SIM card will I be able to use all of the iPhone functionality? In other words can I access the Internet as well as make phone calls using my current plan?