GREAT! Worked with my AT&T samsung captivate that was rooted and running 2.2 froyo. And also worked on my rooted Samsung Galaxy S2 version 2.3.6 from AT&T after update came out 11/23/12. Best 100% guarateed way to unlock your phone. Thanks Dev :) Im one happy customer. Recommend to install SGS Unlock PRO (NEEDS ROOT) APK