I have an iphone 3gs (3.1.3, 5.12.1 ) .
I activated the phone using a friends AT&T sim when i was in USA
I dont have the AT&T sim any more as I moved to India.
Currently I am able to use it as an ipod.
For using spiritjb do i need ATT sim once more after jail breaking. Or the activated state of the phone will not be disturbed once I use jail break tool