have you tried to install jailbreak via the *#307# sequence ?
im guessing that installing jailbreak would be your next move?
from what I can recall
you type in *#307# then press the call button
then delete the *#307#
type 0 then call again
then press answer
then hold
the phone should start ringing again
press decline
that should put you back to the keypad
From there you can select contacts
add a contact
Add the URLs prefs://11
and
http://jailbreakme.com
to the contact and save it
then in the contact screen select the prefs:// contact and setup your wifi connection
then select settings or general (cant recall which) and set Auto Lock to Never
Then you clcik your home button
you should be back at the activate your sim card screen.
from there you
slide the emercency call
then dial the same sequance to get to the keypad
select contacts and then go the the jailbreakme.com
i think you have to install appsnap after that.
I am sure someone here can tell you if my advice is totally wrong or not.