[AC Question]

I am using a Samsung Galaxy S5 - I just recently updated to Android version 6.0.1 using Kies 3. I was expecting the appearance changes that came along with Marshmallow like the changed lock screen / notifications bar, however, my OS looks very similar to Lollipop. The only appearance change is a different font size. I still have new features that come along with Marshmallow, but would like the new lock screen too.

[Sam_Gs7]

Weird-Ehh! if you Upgrade to Marshmallow it should display all the
GUI-Apps-Notifications that comes with it : It may need a Factory
reset and Update again to Marshmallow to get the proper-GUI

Check this out, with your Phn-Carrier if is worth it to doSo
or get a NewPhn maybe the best option: Up toYou-Bye

[iDrizzy]

I wouldn't expect any visible UI change on a s5. Can only notice on newer phones like s6,s7. I Could be wrong though.