I did a full back-up of my 6s on my Mac, then reset and powered down my 6s (running iOS 10.0.1). Then turned on my 7+ and restored from the 6s back up I did. After that I activated the phone with Sprint through the Live Chat. Everything was back on my phone (texts, call history, photos, music, etc.) without losing anything. My photos app had already ran through faces on my 6s, and spotlight was well established. All of this transferred over as well. I played with the camera for a bit, put the phone on the charger, and went to bed. I have been up and about with the phone since 7am this morning...battery is at 97%. That's with my normal calls, texts, streaming music, and show the phone off to coworkers who are thinking about getting one. I have Apple Car Play in my car, which, connects through lightening anyways...so listening to music while driving and getting a charge at the same time isn't a problem. Hopefully, keeping a charge with some longevity continues, but thought I would share.