Iphone 4 Untethered Jailbreak with ANY ATT Sim card?

i have quick question.

if untether jailbreak iphone 4 ios 5.0.1, able use att sim card, or have use ultrasn0w unlock or gevey?

 

if have at&t-locked (or unlocked) phone, can use at&t sim card on it. no jb needed.

 

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