3g Iphone won't read att sim card..

[ransome]

I just picked up a 3g 8gb(2.1 modem 02.11.07) if I try to put an att sim into it reads "no sim", If I put a t-mobile sim it shows dots where the bars should be. Do you think the phone is defective or do you think someone tried putting 2.1 firmware back onto the phone?

[DJSMITH]

did you try a restore?

[Poseidon79]

That's what I would do... plug into iTunes... hit restore and then jailbreak with quickpwn. If it STILL doesn't work then I would say it's a defective SIM. Of course a t-mobile SIM will show zero bars b/c the phone is locked.

[ransome]

I did a restore, same result. Must be a hardware problem, I just wanted to keep the 2.1 for unlocking.I guess I will try to get apple to repair it.