Iphone 4 Untethered Jailbreak with ANY ATT Sim card?

[tangytangojuice]

I have a quick question.

If I untether jailbreak my iphone 4 ios 5.0.1, will I be able to use any ATT sim card, or do I have to use UltraSn0w unlock or something like a gevey?

Thanks

 

[dehory]

If you have an AT&T-locked (or unlocked) phone, you can already use any AT&T SIM card on it. No JB needed.

 

[tangytangojuice]

I mean, i want the jailbreak features on my iphone 4, but if i jailbraek it, will it affect my ability to use my ATT sim card.

 

[dehory]

Jailbreaking will not affect your ability to use any SIM card that works pre-jailbreak.