Can I use the straight talk T-mobile SIM card?

I have a unlocked AT&T iphone 4s and I want to use straight talk. I was wondering, could I use the T-mobile SIM card on their website and cut it into a a micro sim card? Would it work fine with my AT&T phone?

Yes it would as long as its unlocked.trim the card well to make it fit or ask for a micro sim at the tmobile store. Or look at a youtube video on how to cut it.

Not the same sort of SIM card!

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