Ok. I have read thread after thread on this subject. And I am just getting more confused. I have a Samsung Galaxy SIII through AT&T. When I called straight talk they said this phone was compatible with the program. So I bought the ATT compatible straight talk sim through walmart. It was a normal sim card. So I couldn't use it. I need a micro sim. When I called straight talk today, they told me my phone wasn't compatible because it went through ATT. Big question, is it compatible, and if so what do I do to set this stuff up? Any help would be awesome. And dumb it down...I can be dense