hi is my first post in this forum and i m very sorry for my english,so i have some questions
A)I would want to learn how to found the sim code of AT&T sim card because i accomplished that. I take my iphone for ebay and i try some tricks to unlocked sim card,some off that is settings > phone > sim pin ,ok i try some times and his locked this, now it asks the PUK!!!!
B) An other problem there is connect the phone in wifi on my mac mini some times worked but now nothing more.
the iphone has have this IP Address
DHCP
IP Address 10.0.2.2
Subnet Mask 255.255.255.0
Router 10.0.2.1
DNS 10.0.2.1 i learn is some blogs and i try this DNS 72.14.207.99. and working a few times but now stop is work

hey man. about your wifi troubles. check this out
http://hackint0sh.org/forum/showthread.php?t=1459

you can find all answers you need there (there are several links for all possible wifi-related problems).

good luck

thanks my friend