My friend has a out of box 1.1.1 iPhone and was downgraded to 1.0.2 and everything works fine as activated, jailbreak and unlocked.

Don't know which method but definitely anysim to unlock.

Now my friend wants to upgrade to 1.1.1, and I have searched the forumS that some iphones will not have WiFi after being upgraded. That makes me hesitate to help because there will be no way to do anything (SSH or WinSCP).

Wonder what should I check before I will assist my friend??