I think the only way to software unlock it is still to use the iPad baseband which has a few issues with it, so I wouldn't recommend it unless you absolutely can't afford an officially unlocked iPhone.Have not followed the info for some time, can iphone 3gs be software unlocked now? or can it be unlocked using a sim adapter? Was looking for buying a used one for a relative, but not sure about the unlocking method.
Do you have a link to how to do that? I've got an old 3G that I unlocked with the iPad bb and would love to have it as a backup phone without the problems that the iPad bb causes.Actually there's a new method to downgrade from the ipad bb to an older unlockable one with ultrasnow and still have everything function fine.