Just went walking with the S3 only, no iPhone. Results: 1. Played music from onboard playlist to my AirPods - No issues (love the music controls in the workout app) 2. Recieved a couple of text messages, news updates and email 3. Got home and workout was shown in my workout app along with the usual map, heart and pace information 4. Battery level started at 100% and ended at 50% (2 hours of walking) I couldn't make a call or receive one. Not sure if that should work or it's data only. And if its data only should I be able to make a Facetime call? (I'm on T-Mobile. Initial setup worked without issues) Aside from the call issue, the S3 worked great and I'm very happy with it.