I'm complaining because Lollipop doesn't have the top of the lockscreen icon notifications that Kit Kat had & Lollipop 5.1 will have. So now I have to unlock my screen to know why the LED is flashing which is at least 20 times a day. I can't use the lockscreen notifications because they block my lockscreen message which has my ICE contact #'s on it & I haven't taken the time to edit the lockscreen custom picture to have those ICE #'s appear at the bottom.
Because I haven't had a spare couple of hours minimum to do a factory reset this is what Lollipop has done for me besides the above:
1) considerably worse battery life
2) loss of fast charge in my car
3) no temperature in the upper left hand corner of my lockscreen
4) lockscreen (if I used them) & homescreen notifications I do not like as well as those in Kit Kat
Hopefully a factory reset will resolve issues 1 & 2 but certainly not 3 & 4 or the lockscreen icon notifications.
My bottom line is I was perfectly satisfied with my N4 on Kit Kat & now on Lollipop obviously I'm not. Lollipop took away basic functionality for the way I use my phone. I get that a lot of users are having better experiences on Lollipop but there are also a lot us that are not. Going back to Gingerbread over 5 years ago I don't recall so many forum members posting about problems/issues on so many different threads about an OS update. I know I never had a problem with any of the previous OS updates.
So I'm firmly with the thumbs down to Lollipop crowd and believe me I wish that wasn't the case. I still like my N4 just not as well as I used to. People use their phones differently so removing basic functionality is going to effect user experiences differently. I had no noticeable lag on Kit Kat & never thought it was a slow OS so I don't notice any difference in the speed of Lollipop but that's me & it is my phone I'm talking about that I paid AT&T for and continue to pay them monthly to use.
The Lollipop update should have been optional not mandatory. If it were optional I never would have downloaded/installed it-problems solved. I need a phone that is completely functional for the way I use it. It was & now it's not.