Samsung Galaxy S4 — Android kit kat update?

Hi Angel,
I was wondering what type of change you are expecting in your S4, I'd like to point out "The phone app hasn't change nor has my email or anything else. Any reason why? Please help" We updating hasn't any effect over your email address these updates are majorly bug fixes,performance etc ! The update is not suppose to update your email address ......

The phone app hasn't change nor has my email or anything else. Any reason why? Please help

Angel (what a lovely name),if I was you (which IN am Not cos I'm a 70year old non-geek) I wouldn't worry about what changes Kit Kat is all about cos by the time you have it all sussed out we will be at (say) the S8-"Rice Pudding).When I was a kid I used to work on the Kit Kat production line and after four years of nothing but Kit Kats,to get one on the phone would make me vomit.
I got Jelly Bean 4.3 on my S3 yesterday after six months of feeling I was missing out and being cheated.Well I've gone from 4.1 to 4.3 and I'm damned as to why I fretted so much,being a non-geek. I know where you are coming from,worrying about updates but my S3 is one year old and seeing as how Samsung are already at the S5,I have finally (after much meditation) that it's only a phone,not a Liver transplant machine--so what the hell why dont we all just go with the flow and stop our fretting over,not a lot.

Yes, you won't see a lot as some things right now are only for the Nexus phones. A lot is polish to the system. A major thing on my nexus 7 is battery management, especially when on wifi. It used to always be one of the top 2 uses of battery life, now it barely makes the top 10.As you use it you'll notice other things. It's a good update IMHO. Good luck and do a google search on the differences.