You might want to give us more details here.. Define "work with"...
✔Smart switch and regarding which "Android version" Lollipop-Marshmallow,.etc.Sorry, I'm a windows phone user. I'm considering a switch to a Samsung phone to use with the S3. I don't have any experience using an android phone. I'm curious if the S3 will need a phone with a certain......software? ie Lollipop, Nougat, etc.
I love my Band 2 and the tight integration of notifications and features. I would want the same integration between the phone and S3.
I actually enjoy WP. My carrier will have no bearing on my decision.✔Smart switch and regarding which "Android version" Lollipop-Marshmallow,.etc.
Would be the Best to install: I guess will be determined by your carrier
I think it is not necessary to switch to a samsung phone.
All these watches are compatible with different OS.