[Ariel Diesel]

Phone is originally AT&T. Will recognize that card as well as my husbands Straight Talk micro sim card (before they did away with them) so yes, I had to cut my sim card. It fits in there perfectly, clicks and all. The sim card was working (minus data for the last month or so) on my iPhone 3 prior to cutting. Does not give me the sim network pin screen or any kind of error message when you turn the phone on, just comes on like normal and shows the icon in the top left hand corner that the sim is not recognized. I do have the unlock code directly from AT&T but can not input the code since it wont give me that screen. The cut sim is a Tmobile Straight Talk sim..... Any suggestions?

[GTWalling]

You may need to go to Straight Talk and get the correct Sim card. I think the iPhone uses a different type.

[Ariel Diesel]

I had this sim card in an android before it was in the iPhone and it worked fine then, with data and all. That's why I went back to an android. Its just a regular run on the mill Straight Talk Tmobile sim card that I had to cut to make micro sized but fits like it should in the S3.