iPhone 2G (unlocked updated to 2.0, registration?)

[danilon]

I got this in May 2008, have it jailbroken (unlocked) for Tmobile.
Then, I played with it yesterday and upgraded it with 2.0 using my Mac. BUT during the registration it doesn't go through because it's only asking for an AT&T account.
Now, all I have is the iTunes and USB showing on the screen.

I need help please, Don't know what to do. :(

[Tallest Skil]

Ignore the registration, unlock it again.

[srikanthrl]

same problem, not sure which software has to be used. intially used ziphone to unlock and after upgrade i did restore. then itunes with usb image came. the version of iphone and capacity is shown as n/a. pl.. help me how to resolve this issue

[neesh0]

use pwnage tool to unlock 2g iphones on 2.x firmware

[mkrishnan]

Are you guys seriously upgrading to firmware 2.0 now?

If so, when you upgrade from 1.x to 2.x, you must typically unlock again. So you should use Pwnage Tool or the like to get an unlocked 2.x onto it. Once you do that, you only need to use these tools if you want to keep the phone jailbreaked -- the 2.x updates up to now have not caused the phone to get re-locked, but the transition from 1.x to 2.x does.

[Ninja Dom]

Easily solved, just like the poster above said.

1) Download official firmware 2.1 or 2.2 use the link below, go to post number 2 and download the official firmwares.
http://forums.macrumors.com/showthread.php?t=457556

2) Download Pwnage Tool 2.2.1 (Mac Only).

3) Run Pwnage Tool and create a custom firmware that is saved on your desktop.

4) Restore the phone in iTunes to the newly created custom firmware.