Apple Seeds iPhone OS 3.1 to Developers LIKE TWEET SHARE PIN SHARE POST MAIL MORE Posted June 30, 2009 at 9:13pm by iClarified · 12836 views Apple has seeded iPhone OS 3.1 to developers along with a new version of the iPhone SDK.Few details have been provided; however, its likely that Apple has closed the exploit used by ultrasn0w to unlock the iPhone.Remember not to update when the new firmware goes public.